diff --git a/.gitignore b/.gitignore
index ebb44fd..b854022 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 *.nms
 *.vmo
 CodeGen/dest/*.txt
+PyCmoOld/
 
 .vscode/
 
diff --git a/CodeGen/src/CKMISC.txt b/CodeGen/src/CKMISC.txt
index fc0f4af..c2c1f55 100644
--- a/CodeGen/src/CKMISC.txt
+++ b/CodeGen/src/CKMISC.txt
@@ -25,3 +25,14 @@ enum CK_FO_OPTIONS
 		CK_FO_DONTLOADOBJECT,	 // Object chunk will not be read either because it is a reference
 								// or because the loaded object already exist in the current level 
 								// and the user choose to keep the existing one.
+
+enum CK_PLUGIN_TYPE
+	CKPLUGIN_BITMAP_READER		= 0,	// The plugin is bitmap (textures,sprites) loader
+	CKPLUGIN_SOUND_READER		= 1,	// Sound Reader Plugin
+	CKPLUGIN_MODEL_READER		= 2,	// 3D Model Reader 
+	CKPLUGIN_MANAGER_DLL		= 3,	// The plugin implements a Manager
+	CKPLUGIN_BEHAVIOR_DLL		= 4,	// The plugin implements one or more behaviors
+	CKPLUGIN_RENDERENGINE_DLL	= 5,	// Render Engine plugin
+	CKPLUGIN_MOVIE_READER		= 6,	// Movie (AVI,Mpeg) reader		
+	CKPLUGIN_EXTENSION_DLL		= 7,	// Generic extension (definition of new parameter types or operations for ex.)	
+
diff --git a/LibCmo/VTConstants.hpp b/LibCmo/VTConstants.hpp
index 7c7c462..b89b22e 100644
--- a/LibCmo/VTConstants.hpp
+++ b/LibCmo/VTConstants.hpp
@@ -193,6 +193,16 @@ namespace LibCmo {
         CK_FO_REPLACEOBJECT,
         CK_FO_DONTLOADOBJECT
     };
+    enum class CK_PLUGIN_TYPE : int32_t {
+        CKPLUGIN_BITMAP_READER = 0,
+        CKPLUGIN_SOUND_READER = 1,
+        CKPLUGIN_MODEL_READER = 2,
+        CKPLUGIN_MANAGER_DLL = 3,
+        CKPLUGIN_BEHAVIOR_DLL = 4,
+        CKPLUGIN_RENDERENGINE_DLL = 5,
+        CKPLUGIN_MOVIE_READER = 6,
+        CKPLUGIN_EXTENSION_DLL = 7
+    };
 
 }
 
diff --git a/LibCmo/VTReader.cpp b/LibCmo/VTReader.cpp
index c2e637f..c0ccedc 100644
--- a/LibCmo/VTReader.cpp
+++ b/LibCmo/VTReader.cpp
@@ -23,9 +23,11 @@ namespace LibCmo {
 		if (u8_filename == nullptr) return CKERROR::CKERR_INVALIDPARAMETER;
 
 		this->m_FileName = u8_filename;
-		this->m_MappedFile = new VxMemoryMappedFile(this->m_FileName.c_str());
+		this->m_MappedFile = new(std::nothrow) VxMemoryMappedFile(this->m_FileName.c_str());
+		if (this->m_MappedFile == nullptr) return CKERROR::CKERR_OUTOFMEMORY;
 		if (!this->m_MappedFile->IsValid()) return CKERROR::CKERR_INVALIDFILE;
 
+		// MARK: CKContext::SetLastCmoLoaded
 		return this->OpenMemory(this->m_MappedFile->GetBase(), this->m_MappedFile->GetFileSize(), flags);
 	}
 
@@ -34,8 +36,11 @@ namespace LibCmo {
 		// compare magic words
 		if (BufferSize < 0x20 || memcmp(MemoryBuffer, "Nemo", 4u)) return CKERROR::CKERR_INVALIDFILE;
 
-		this->m_Parser = new CKBufferParser(MemoryBuffer, BufferSize, false);
+		this->m_Parser = new(std::nothrow) CKBufferParser(MemoryBuffer, BufferSize, false);
+		if (this->m_Parser == nullptr) return CKERROR::CKERR_OUTOFMEMORY;
+		// MARK: eliminate check of m_Parser->m_ReaderBegin
 
+		// MARK: dword_2405F6C0 = 0;
 		this->m_Flags = Flags;
 		this->m_IndexByClassId.resize(static_cast<size_t>(CK_CLASSID::CKCID_MAXCLASSID));
 		return this->ReadFileHeaders(&(this->m_Parser));
@@ -49,8 +54,7 @@ namespace LibCmo {
 		CKDWORD fhdr1[8];
 		CKDWORD fhdr2[8];
 		if (parser->GetSize() < sizeof(fhdr1)) return CKERROR::CKERR_INVALIDFILE;
-		memcpy(fhdr1, parser->GetPtr(), sizeof(fhdr1));
-		parser->MoveCursor(sizeof(fhdr1));
+		parser->ReadAndMove(fhdr1, sizeof(fhdr1));
 
 		if (fhdr1[5]) {	// it seems that there is a ZERO checker?
 			memset(fhdr1, 0, sizeof(fhdr1));
@@ -64,8 +68,7 @@ namespace LibCmo {
 			memset(fhdr2, 0, sizeof(fhdr2));
 		} else {
 			if (parser->GetSize() < sizeof(fhdr1) + sizeof(fhdr2)) return CKERROR::CKERR_INVALIDFILE;
-			memcpy(fhdr2, parser->GetPtr(), sizeof(fhdr2));
-			parser->MoveCursor(sizeof(fhdr2));
+			parser->ReadAndMove(fhdr2, sizeof(fhdr2));
 		}
 
 		// forcely reset too big product ver
@@ -111,7 +114,11 @@ namespace LibCmo {
 			// compare size to decide wheher use compress feature
 			void* decomp_buffer = CKUnPackData(this->m_FileInfo.Hdr1UnPackSize, parser->GetPtr(), this->m_FileInfo.Hdr1PackSize);
 			if (decomp_buffer != nullptr) {
-				parser = new CKBufferParser(decomp_buffer, this->m_FileInfo.Hdr1UnPackSize, true);
+				parser = new(std::nothrow) CKBufferParser(decomp_buffer, this->m_FileInfo.Hdr1UnPackSize, true);
+				if (parser == nullptr) {
+					free(decomp_buffer);
+					return CKERROR::CKERR_OUTOFMEMORY;
+				}
 			}
 		}
 
@@ -124,31 +131,100 @@ namespace LibCmo {
 			this->m_FileObject.resize(this->m_FileInfo.ObjectCount);
 
 			// read data
-			for (auto it = this->m_FileObject.begin(); it != this->m_FileObject.end(); ++it) {
-				CKFileObject* fileobj = &(*it);
+			for (auto& fileobj : this->m_FileObject) {
 				// setup useless fields
-				fileobj->ObjPtr = nullptr;
-				fileobj->Data = nullptr;
+				fileobj.ObjPtr = nullptr;
+				fileobj.Data = nullptr;
 
 				// read basic fields
-				memcpy(&(fileobj->Object), parser->GetPtr(), sizeof(CK_ID));
-				parser->MoveCursor(sizeof(CK_ID));
-				memcpy(&(fileobj->ObjectCid), parser->GetPtr(), sizeof(CK_CLASSID));
-				parser->MoveCursor(sizeof(CK_CLASSID));
-				memcpy(&(fileobj->FileIndex), parser->GetPtr(), sizeof(CKDWORD));
-				parser->MoveCursor(sizeof(CKDWORD));
+				parser->ReadAndMove(&(fileobj.Object), sizeof(CK_ID));
+				parser->ReadAndMove(&(fileobj.ObjectCid), sizeof(CK_CLASSID));
+				parser->ReadAndMove(&(fileobj.FileIndex), sizeof(CKDWORD));
 
 				CKDWORD namelen;
-				memcpy(&namelen, parser->GetPtr(), sizeof(CKDWORD));
-				parser->MoveCursor(sizeof(CKDWORD));
+				parser->ReadAndMove(&namelen, sizeof(CKDWORD));
 				if (namelen != 0) {
-					fileobj->Name.resize(namelen);
-					memcpy(fileobj->Name.data(), parser->GetPtr(), namelen);
-					parser->MoveCursor(namelen);
+					fileobj.Name.resize(namelen);
+					parser->ReadAndMove(fileobj.Name.data(), namelen);
 				}
 			}
 		}
 
+		// ========== dep list read ==========
+		// file ver >= 8 have this feature
+		bool noDepLost = true;
+		if (this->m_FileInfo.FileVersion >= 8) {
+			// get size and resize
+			CKDWORD depSize;
+			parser->ReadAndMove(&depSize, sizeof(CKDWORD));
+			this->m_PluginDep.resize(depSize);
+
+			CKDWORD guid_size;
+			for (auto& dep : this->m_PluginDep) {
+				// read category
+				parser->ReadAndMove(&(dep.m_PluginCategory), sizeof(CK_PLUGIN_TYPE));
+				// get size and resize
+				parser->ReadAndMove(&guid_size, sizeof(CKDWORD));
+				dep.m_Guids.resize(guid_size);
+				dep.ValidGuids.resize(guid_size);
+				// read data
+				if (guid_size != 0) {
+					parser->ReadAndMove(dep.m_Guids.data(), sizeof(CKGUID)* guid_size);
+				}
+
+				// extra load flag
+				if (EnumHelper::FlagEnumHas(this->m_Flags, CK_LOAD_FLAGS::CK_LOAD_CHECKDEPENDENCIES)) {
+					for (size_t i = 0u; i < dep.m_Guids.size(); ++i) {
+						// MARK: CKPluginManager::FindComponent
+						bool plgEntryIsNull = true;
+						if (plgEntryIsNull) {
+							noDepLost = false;
+							dep.ValidGuids[i] = false;
+						} else {
+							dep.ValidGuids[i] = true;
+						}
+					}
+				}
+
+			}
+		}
+
+		// ========== included file list read ==========
+		// file ver >= 8 have this feature
+		if (this->m_FileInfo.FileVersion >= 8) {
+			// MARK: i don't knwo what is this!
+			int32_t unknowIncludedFileFlag;
+			parser->ReadAndMove(&unknowIncludedFileFlag, sizeof(int32_t));
+
+			if (unknowIncludedFileFlag > 0) {
+				// read included file size and resize
+				CKDWORD includedFileCount;
+				parser->ReadAndMove(&includedFileCount, sizeof(CKDWORD));
+				this->m_IncludedFiles.resize(includedFileCount);
+
+				unknowIncludedFileFlag -= 4;
+			}
+
+			// backward pos
+			parser->SetCursor(unknowIncludedFileFlag);
+		}
+
+		// ========== read data ==========
+		// restore old parser if needed
+		if (parser != *ParserPtr) {
+			delete parser;
+			parser = *ParserPtr;
+			parser->MoveCursor(this->m_FileInfo.Hdr1PackSize);
+		}
+
+		// MARK: dword_2405F6BC, dword_2405F6B8 set
+
+		if (!(EnumHelper::FlagEnumHas(this->m_Flags, CK_LOAD_FLAGS::CK_LOAD_CHECKDEPENDENCIES) &&
+			this->m_FileInfo.FileVersion < 8)) {
+			// we have read all header. return result
+			return noDepLost ? CKERROR::CKERR_OK : CKERROR::CKERR_PLUGINSMISSING;
+		} // however, if we need check dep, and, we have not read dep list. continue read them.
+
 		return CKERROR::CKERR_OK;
 	}
 
diff --git a/LibCmo/VTStruct.cpp b/LibCmo/VTStruct.cpp
index 9b172e7..b02bd7a 100644
--- a/LibCmo/VTStruct.cpp
+++ b/LibCmo/VTStruct.cpp
@@ -96,7 +96,7 @@ namespace LibCmo {
 
 		// write member data
 		m_pMemoryMappedFileBase = m_hFileMapView;
-		m_cbFile = static_cast<size_t>(m_dwFileSizeLow) | (static_cast<size_t>(m_dwFileSizeHigh) << 32);
+		m_cbFile = static_cast<size_t>(static_cast<uint64_t>(m_dwFileSizeLow) | (static_cast<uint64_t>(m_dwFileSizeHigh) << 32));
 
 #else
 #error NO IMPLEMENTATION FOR LINUX MMAP!
@@ -142,7 +142,7 @@ namespace LibCmo {
 
 #pragma region CKFile Misc
 
-	CKFile::CKFile(const Utils::VirtoolsContext& cfg) :
+	CKFile::CKFile(const Utils::VirtoolsEnvironment& cfg) :
 		m_Parser(nullptr), m_MappedFile(nullptr),
 		m_UserCfg(cfg) {
 		;
diff --git a/LibCmo/VTStruct.hpp b/LibCmo/VTStruct.hpp
index 83bcbf1..158866e 100644
--- a/LibCmo/VTStruct.hpp
+++ b/LibCmo/VTStruct.hpp
@@ -67,6 +67,10 @@ namespace LibCmo {
 		~CKBufferParser();
 
 		inline const void* GetPtr(void) { return (this->m_ReaderBegin + m_ReaderPos); }
+		inline void ReadAndMove(void* data, size_t data_size) {
+			memcpy(data, (this->m_ReaderBegin + m_ReaderPos), data_size);
+			this->m_ReaderPos += data_size;
+		}
 		inline size_t GetSize(void) { return this->m_ReaderSize; }
 		inline void MoveCursor(size_t off) { this->m_ReaderPos += off; }
 		inline void SetCursor(size_t off) { this->m_ReaderPos = off; }
@@ -104,14 +108,14 @@ namespace LibCmo {
 	};
 
 	struct CKFilePluginDependencies {
-		CKDWORD m_PluginCategory;
+		CK_PLUGIN_TYPE m_PluginCategory;
 		XArray<CKGUID> m_Guids;
 		XBitArray ValidGuids;
 	};
 
 	class CKFile {
 	public:
-		CKFile(const Utils::VirtoolsContext& cfg);
+		CKFile(const Utils::VirtoolsEnvironment& cfg);
 		CKFile(const CKFile&) = delete;
 		CKFile& operator=(const CKFile&) = delete;
 		~CKFile();
@@ -141,7 +145,7 @@ namespace LibCmo {
 		bool m_ReadFileDataDone;
 
 	private:
-		Utils::VirtoolsContext m_UserCfg;
+		Utils::VirtoolsEnvironment m_UserCfg;
 	};
 
 }
diff --git a/LibCmo/VTUtils.hpp b/LibCmo/VTUtils.hpp
index 7759159..008fba2 100644
--- a/LibCmo/VTUtils.hpp
+++ b/LibCmo/VTUtils.hpp
@@ -46,9 +46,9 @@
 namespace LibCmo {
 	namespace Utils {
 
-		struct VirtoolsContext {
+		struct VirtoolsEnvironment {
 			std::string NameEncoding;
-
+			std::string TempFolder;
 		};
 
 	}
diff --git a/PyCmo/PyCmo.py b/PyCmo/PyCmo.py
deleted file mode 100644
index 4a44cda..0000000
--- a/PyCmo/PyCmo.py
+++ /dev/null
@@ -1,7 +0,0 @@
-import VTReader, VTStruct, VTConstants
-
-ckFile = VTStruct.CKFile()
-VTReader.CKFileReader.Load(ckFile, "D:\\libcmo21\\PyCmo\\Language.old.nmo", VTConstants.CK_LOAD_FLAGS(VTConstants.CK_LOAD_FLAGS.CK_LOAD_DEFAULT))
-print(ckFile)
-print(str(ckFile.m_FileObjects))
-
diff --git a/PyCmo/PyCmo.pyproj b/PyCmo/PyCmo.pyproj
deleted file mode 100644
index 19861d1..0000000
--- a/PyCmo/PyCmo.pyproj
+++ /dev/null
@@ -1,50 +0,0 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
-  <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <SchemaVersion>2.0</SchemaVersion>
-    <ProjectGuid>adc519e8-5f1b-427d-8e5c-1fabcb6147fb</ProjectGuid>
-    <ProjectHome>.</ProjectHome>
-    <StartupFile>PyCmo.py</StartupFile>
-    <SearchPath>
-    </SearchPath>
-    <WorkingDirectory>.</WorkingDirectory>
-    <OutputPath>.</OutputPath>
-    <Name>PyCmo</Name>
-    <RootNamespace>PyCmo</RootNamespace>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
-    <DebugSymbols>true</DebugSymbols>
-    <EnableUnmanagedDebugging>false</EnableUnmanagedDebugging>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
-    <DebugSymbols>true</DebugSymbols>
-    <EnableUnmanagedDebugging>false</EnableUnmanagedDebugging>
-  </PropertyGroup>
-  <ItemGroup>
-    <Compile Include="PyCmo.py" />
-    <Compile Include="PyCmoMisc.py">
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Include="VTConstants.py">
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Include="VTReader.py">
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Include="VTStruct.py">
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Include="VTUtils.py">
-      <SubType>Code</SubType>
-    </Compile>
-  </ItemGroup>
-  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Python Tools\Microsoft.PythonTools.targets" />
-  <!-- Uncomment the CoreCompile target to enable the Build command in
-       Visual Studio and specify your pre- and post-build commands in
-       the BeforeBuild and AfterBuild targets below. -->
-  <!--<Target Name="CoreCompile" />-->
-  <Target Name="BeforeBuild">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
-</Project>
\ No newline at end of file
diff --git a/PyCmo/PyCmoMisc.py b/PyCmo/PyCmoMisc.py
deleted file mode 100644
index 7e991ef..0000000
--- a/PyCmo/PyCmoMisc.py
+++ /dev/null
@@ -1,46 +0,0 @@
-import functools, inspect
-
-def OutputSizeHumanReadable(storage_size: int):
-    probe = storage_size
-
-    # check Bytes
-    if (probe >> 10) == 0:
-        return f"{storage_size:d}Bytes"
-    probe >>= 10
-
-    # check KiB
-    if (probe >> 10) == 0:
-        return f"{(storage_size / (1 << 10)):.2f}KiB"
-    probe >>= 10
-
-    # check MiB
-    if (probe >> 10) == 0:
-        return f"{(storage_size / (1 << 20)):.2f}MiB"
-    probe >>= 10
-
-    # otherwise GiB
-    return f"{(storage_size / (1 << 30)):.2f}GiB"
-
-def BcdCodeToDecCode(bcd_num: int):
-    result = 0
-    pow = 1
-
-    while bcd_num != 0:
-        result += (bcd_num & 0xf) * pow
-        bcd_num >>= 4
-        pow *= 10
-
-    return result
-
-def ClsMethodRegister(cls):
-    def decorator(func):
-        @functools.wraps(func) 
-        def wrapper(self, *args, **kwargs): 
-            return func(self, *args, **kwargs)
-        if inspect.getattr_static(cls, func.__name__, None):
-            msg = 'Error. method name REPEAT, {} has exist'.format(func.__name__)
-            raise NameError(msg)
-        else:
-            setattr(cls, func.__name__, wrapper)
-        return func 
-    return decorator
diff --git a/PyCmo/VTConstants.py b/PyCmo/VTConstants.py
deleted file mode 100644
index 4090da1..0000000
--- a/PyCmo/VTConstants.py
+++ /dev/null
@@ -1,350 +0,0 @@
-import enum
-
-class CKEnumItem(object):
-    def __init__(self, name: str, value: int):
-        self.name: str = name
-        self.value: int = value
-
-class CKEnum(object):
-    def __init__(self, val: int):
-        self.m_Value: int = val
-
-        self.__ItemsList = (
-            CKEnumItem(attr, getattr(self, attr)) 
-            for attr in dir(self) if not attr.startswith("__") and not callable(getattr(self, attr))
-        )
-
-    def Set(self, data: int):
-        self.m_Value = data
-
-    def __iter__(self):
-        return self.__ItemsList
-
-    def __repr__(self):
-        for i in self:
-            if i.value == self.m_Value:
-                return '<' + i.name + '>'
-
-        return "<[None]: {:d}>".format(self.m_Value)
-
-    def __str__(self):
-        return self.__repr__()
-
-class CKFlagEnum(CKEnum):
-    def Add(self, data: int):
-        self.m_Value = self.m_Value | data
-
-    def __contains__(self, probe):
-        if isinstance(probe, int):
-            return bool(self.m_Value & probe)
-        if isinstance(probe, CKFlagEnum):
-            return bool(self.m_Value & probe.m_Value)
-
-        return False
-
-    def __repr__(self):
-        pending = []
-
-        for i in self:
-            # if it have exactly same entry, return directly
-            if i.value == self.m_Value:
-                return '<' + i.name + '>'
-
-            # check exist
-            if bool(self.m_Value & i.value):
-                pending.append(i.name)
-
-        result = ', '.join(pending)
-        return ('<' + result + '>') if len(result) != 0 else "<[None]: {:d}>".format(self.m_Value)
-
-class CK_FILE_WRITEMODE(CKFlagEnum):
-    CKFILE_UNCOMPRESSED	       =0	# Save data uncompressed
-    CKFILE_CHUNKCOMPRESSED_OLD =1	# Obsolete
-    CKFILE_EXTERNALTEXTURES_OLD=2	# Obsolete : use CKContext::SetGlobalImagesSaveOptions instead.
-    CKFILE_FORVIEWER           =4	# Don't save Interface Data within the file, the level won't be editable anymore in the interface
-    CKFILE_WHOLECOMPRESSED     =8	# Compress the whole file
-
-class CK_LOAD_FLAGS(CKFlagEnum):
-    CK_LOAD_ANIMATION					=1<<0	# Load animations
-    CK_LOAD_GEOMETRY					=1<<1	# Load geometry.
-    CK_LOAD_DEFAULT						=CK_LOAD_GEOMETRY|CK_LOAD_ANIMATION	# Load animations & geometry
-    CK_LOAD_ASCHARACTER					=1<<2 # Load all the objects and create a character that contains them all .
-    CK_LOAD_DODIALOG					=1<<3 # Check object name unicity and warns the user with a dialog box when duplicate names are found. 
-    CK_LOAD_AS_DYNAMIC_OBJECT			=1<<4 # Objects loaded from this file may be deleted at run-time or are temporary
-    CK_LOAD_AUTOMATICMODE				=1<<5 # Check object name unicity and automatically rename or replace according to the options specified in CKContext::SetAutomaticLoadMode
-    CK_LOAD_CHECKDUPLICATES				=1<<6 # Check object name unicity (The list of duplicates is stored in the CKFile class after a OpenFile call
-    CK_LOAD_CHECKDEPENDENCIES			=1<<7 # Check if every plugins needed are availables
-    CK_LOAD_ONLYBEHAVIORS				=1<<8 # 
-
-class CK_FO_OPTIONS(CKEnum):
-    CK_FO_DEFAULT = 0
-    CK_FO_RENAMEOBJECT = 1
-    CK_FO_REPLACEOBJECT = 2
-    CK_FO_DONTLOADOBJECT = 3
-
-CK_ID = int
-
-ClassHierarchy = {
-    1: ("CKCID_OBJECT", ),
-    2: ("CKCID_OBJECT", "CKCID_PARAMETERIN", ),
-    4: ("CKCID_OBJECT", "CKCID_PARAMETEROPERATION", ),
-    5: ("CKCID_OBJECT", "CKCID_STATE", ),
-    6: ("CKCID_OBJECT", "CKCID_BEHAVIORLINK", ),
-    8: ("CKCID_OBJECT", "CKCID_BEHAVIOR", ),
-    9: ("CKCID_OBJECT", "CKCID_BEHAVIORIO", ),
-    12: ("CKCID_OBJECT", "CKCID_RENDERCONTEXT", ),
-    13: ("CKCID_OBJECT", "CKCID_KINEMATICCHAIN", ),
-    11: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", ),
-    15: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_OBJECTANIMATION", ),
-    16: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_ANIMATION", ),
-    18: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_ANIMATION", "CKCID_KEYEDANIMATION", ),
-    19: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", ),
-    52: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_DATAARRAY", ),
-    10: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_SCENE", ),
-    21: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_LEVEL", ),
-    22: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_PLACE", ),
-    23: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_GROUP", ),
-    24: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_SOUND", ),
-    25: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_SOUND", "CKCID_WAVESOUND", ),
-    26: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_SOUND", "CKCID_MIDISOUND", ),
-    30: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_MATERIAL", ),
-    31: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_TEXTURE", ),
-    32: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_MESH", ),
-    53: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_MESH", "CKCID_PATCHMESH", ),
-    47: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_RENDEROBJECT", ),
-    27: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_RENDEROBJECT", "CKCID_2DENTITY", ),
-    28: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_RENDEROBJECT", "CKCID_2DENTITY", "CKCID_SPRITE", ),
-    29: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_RENDEROBJECT", "CKCID_2DENTITY", "CKCID_SPRITETEXT", ),
-    33: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", ),
-    50: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_GRID", ),
-    36: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_CURVEPOINT", ),
-    37: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_SPRITE3D", ),
-    43: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_CURVE", ),
-    34: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_CAMERA", ),
-    35: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_CAMERA", "CKCID_TARGETCAMERA", ),
-    38: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_LIGHT", ),
-    39: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_LIGHT", "CKCID_TARGETLIGHT", ),
-    40: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_CHARACTER", ),
-    41: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_3DOBJECT", ),
-    42: ("CKCID_OBJECT", "CKCID_SCENEOBJECT", "CKCID_BEOBJECT", "CKCID_3DENTITY", "CKCID_3DOBJECT", "CKCID_BODYPART", ),
-    46: ("CKCID_OBJECT", "CKCID_PARAMETER", ),
-    45: ("CKCID_OBJECT", "CKCID_PARAMETER", "CKCID_PARAMETERLOCAL", ),
-    55: ("CKCID_OBJECT", "CKCID_PARAMETER", "CKCID_PARAMETERLOCAL", "CKCID_PARAMETERVARIABLE", ),
-    3: ("CKCID_OBJECT", "CKCID_PARAMETER", "CKCID_PARAMETEROUT", ),
-    48: ("CKCID_OBJECT", "CKCID_INTERFACEOBJECTMANAGER", ),
-    49: ("CKCID_OBJECT", "CKCID_CRITICALSECTION", ),
-    51: ("CKCID_OBJECT", "CKCID_LAYER", ),
-    54: ("CKCID_OBJECT", "CKCID_PROGRESSIVEMESH", ),
-    20: ("CKCID_OBJECT", "CKCID_SYNCHRO", ),
-    80: ("CKCID_OBJECTARRAY", ),
-    81: ("CKCID_SCENEOBJECTDESC", ),
-    82: ("CKCID_ATTRIBUTEMANAGER", ),
-    83: ("CKCID_MESSAGEMANAGER", ),
-    84: ("CKCID_COLLISIONMANAGER", ),
-    85: ("CKCID_OBJECTMANAGER", ),
-    86: ("CKCID_FLOORMANAGER", ),
-    87: ("CKCID_RENDERMANAGER", ),
-    88: ("CKCID_BEHAVIORMANAGER", ),
-    89: ("CKCID_INPUTMANAGER", ),
-    90: ("CKCID_PARAMETERMANAGER", ),
-    91: ("CKCID_GRIDMANAGER", ),
-    92: ("CKCID_SOUNDMANAGER", ),
-    93: ("CKCID_TIMEMANAGER", ),
-    -1: ("CKCID_CUIKBEHDATA", ),
-    56: ("CKCID_MAXCLASSID", ),
-    128: ("CKCID_MAXMAXCLASSID", ),
-}
-class CK_CLASSID(CKEnum):
-    CKCID_OBJECT = 1
-    CKCID_PARAMETERIN = 2
-    CKCID_PARAMETEROPERATION = 4
-    CKCID_STATE = 5
-    CKCID_BEHAVIORLINK = 6
-    CKCID_BEHAVIOR = 8
-    CKCID_BEHAVIORIO = 9
-    CKCID_RENDERCONTEXT = 12
-    CKCID_KINEMATICCHAIN = 13
-    CKCID_SCENEOBJECT = 11
-    CKCID_OBJECTANIMATION = 15
-    CKCID_ANIMATION = 16
-    CKCID_KEYEDANIMATION = 18
-    CKCID_BEOBJECT = 19
-    CKCID_DATAARRAY = 52
-    CKCID_SCENE = 10
-    CKCID_LEVEL = 21
-    CKCID_PLACE = 22
-    CKCID_GROUP = 23
-    CKCID_SOUND = 24
-    CKCID_WAVESOUND = 25
-    CKCID_MIDISOUND = 26
-    CKCID_MATERIAL = 30
-    CKCID_TEXTURE = 31
-    CKCID_MESH = 32
-    CKCID_PATCHMESH = 53
-    CKCID_RENDEROBJECT = 47
-    CKCID_2DENTITY = 27
-    CKCID_SPRITE = 28
-    CKCID_SPRITETEXT = 29
-    CKCID_3DENTITY = 33
-    CKCID_GRID = 50
-    CKCID_CURVEPOINT = 36
-    CKCID_SPRITE3D = 37
-    CKCID_CURVE = 43
-    CKCID_CAMERA = 34
-    CKCID_TARGETCAMERA = 35
-    CKCID_LIGHT = 38
-    CKCID_TARGETLIGHT = 39
-    CKCID_CHARACTER = 40
-    CKCID_3DOBJECT = 41
-    CKCID_BODYPART = 42
-    CKCID_PARAMETER = 46
-    CKCID_PARAMETERLOCAL = 45
-    CKCID_PARAMETERVARIABLE = 55
-    CKCID_PARAMETEROUT = 3
-    CKCID_INTERFACEOBJECTMANAGER = 48
-    CKCID_CRITICALSECTION = 49
-    CKCID_LAYER = 51
-    CKCID_PROGRESSIVEMESH = 54
-    CKCID_SYNCHRO = 20
-
-    CKCID_OBJECTARRAY = 80
-    CKCID_SCENEOBJECTDESC = 81
-    CKCID_ATTRIBUTEMANAGER = 82
-    CKCID_MESSAGEMANAGER = 83
-    CKCID_COLLISIONMANAGER = 84
-    CKCID_OBJECTMANAGER = 85
-    CKCID_FLOORMANAGER = 86
-    CKCID_RENDERMANAGER = 87
-    CKCID_BEHAVIORMANAGER = 88
-    CKCID_INPUTMANAGER = 89
-    CKCID_PARAMETERMANAGER = 90
-    CKCID_GRIDMANAGER = 91
-    CKCID_SOUNDMANAGER = 92
-    CKCID_TIMEMANAGER = 93
-    CKCID_CUIKBEHDATA = -1
-
-    CKCID_MAXCLASSID = 56
-    CKCID_MAXMAXCLASSID = 128
-
-    def __repr__(self):
-        hierarchy = ClassHierarchy.get(self.m_Value, None)
-        if hierarchy is None:
-            return "[Undefined] {:d}".format(self.m_Value)
-        return "{} ({})".format(
-            hierarchy[-1],
-            ' -> '.join(hierarchy)
-        )
-    def __str__(self):
-        hierarchy = ClassHierarchy.get(self.m_Value, None)
-        if hierarchy is None:
-            return "[Undefined] {:d}".format(self.m_Value)
-        return hierarchy[-1]
-
-
-ErrorDescription = {
-    0: "Operation successful",
-    -1: "One of the parameter passed to the function was invalid",
-    -2: "One of the parameter passed to the function was invalid",
-    -3: "The parameter size was invalid",
-    -4: "The operation type didn't exist",
-    -5: "The function used to execute the operation is not yet implemented",
-    -6: "There was not enough memory to perform the action",
-    -7: "The function  is not yet implemented",
-    -11: "There was an attempt to remove something not present",
-    -13: "There is no level currently created",
-    -14: "There is no level currently created",
-    -16: "The notification message was not used",
-    -17: "Attempt to add an item that was already present",
-    -18: "the render context is not valid",
-    -19: "the render context is not activated for rendering",
-    -20: "there was no plugins to load this kind of file",
-    -21: "there was no plugins to save this kind of file",
-    -22: "attempt to load an invalid file",
-    -23: "attempt to load with an invalid plugin",
-    -24: "attempt use an object that wasnt initialized",
-    -25: "attempt use a message type that wasn't registred",
-    -29: "No dll file found in the parse directory",
-    -30: "this dll has already been registred",
-    -31: "this dll does not contain information to create the prototype",
-    -34: "Invalid Object (attempt to Get an object from an invalid ID)",
-    -35: "Invalid window was provided as console window",
-    -36: "Invalid kinematic chain ( end and start effector may not be part of the same hierarchy )",
-    -37: "Keyboard not attached or not working properly",
-    -38: "Mouse not attached or not working properly",
-    -39: "Joystick not attached or not working properly",
-    -40: "Try to link imcompatible Parameters",
-    -44: "There is no render engine dll",
-    -45: "There is no current level (use CKSetCurrentLevel )",
-    -46: "Sound Management has been disabled",
-    -47: "DirectInput Management has been disabled",
-    -48: "Guid is already in use or invalid",
-    -49: "There was no more free space on disk when trying to save a file",
-    -50: "Impossible to write to file (write-protection ?)",
-    -51: "The behavior cannnot be added to this entity",
-    -52: "The behavior cannnot be added to this entity",
-    -53: "A manager was registered more than once",
-    -54: "CKprocess or TimeManager process while CK is paused will fail",
-    -55: "Some plugins were missing whileloading a file",
-    -56: "Virtools version too old to load this file",
-    -57: "CRC Error while loading file",
-    -58: "A Render context is already in Fullscreen Mode",
-    -59: "Operation was cancelled by user",
-    -121: "there were no animation key at the given index",
-    -122: "attemp to acces an animation key with an invalid index",
-    -123: "the animation is invalid (no entity associated or zero length)",
-}
-class CKERROR(CKEnum):
-    CKERR_OK =  0
-    CKERR_INVALIDPARAMETER = -1
-    CKERR_INVALIDPARAMETERTYPE = -2
-    CKERR_INVALIDSIZE = -3
-    CKERR_INVALIDOPERATION = -4
-    CKERR_OPERATIONNOTIMPLEMENTED = -5
-    CKERR_OUTOFMEMORY = -6
-    CKERR_NOTIMPLEMENTED = -7
-    CKERR_NOTFOUND = -11
-    CKERR_NOLEVEL = -13
-    CKERR_CANCREATERENDERCONTEXT = -14
-    CKERR_NOTIFICATIONNOTHANDLED = -16
-    CKERR_ALREADYPRESENT = -17
-    CKERR_INVALIDRENDERCONTEXT = -18
-    CKERR_RENDERCONTEXTINACTIVE = -19
-    CKERR_NOLOADPLUGINS = -20
-    CKERR_NOSAVEPLUGINS = -21
-    CKERR_INVALIDFILE = -22
-    CKERR_INVALIDPLUGIN = -23
-    CKERR_NOTINITIALIZED = -24
-    CKERR_INVALIDMESSAGE = -25
-    CKERR_NODLLFOUND = -29
-    CKERR_ALREADYREGISTREDDLL = -30
-    CKERR_INVALIDDLL = -31
-    CKERR_INVALIDOBJECT = -34
-    CKERR_INVALIDCONDSOLEWINDOW = -35
-    CKERR_INVALIDKINEMATICCHAIN = -36
-    CKERR_NOKEYBOARD = -37
-    CKERR_NOMOUSE = -38
-    CKERR_NOJOYSTICK = -39
-    CKERR_INCOMPATIBLEPARAMETERS = -40
-    CKERR_NORENDERENGINE = -44
-    CKERR_NOCURRENTLEVEL = -45
-    CKERR_SOUNDDISABLED = -46
-    CKERR_DINPUTDISABLED = -47
-    CKERR_INVALIDGUID = -48
-    CKERR_NOTENOUGHDISKPLACE = -49
-    CKERR_CANTWRITETOFILE = -50
-    CKERR_BEHAVIORADDDENIEDBYCB = -51
-    CKERR_INCOMPATIBLECLASSID = -52
-    CKERR_MANAGERALREADYEXISTS = -53
-    CKERR_PAUSED = -54
-    CKERR_PLUGINSMISSING = -55
-    CKERR_OBSOLETEVIRTOOLS = -56
-    CKERR_FILECRCERROR = -57
-    CKERR_ALREADYFULLSCREEN = -58
-    CKERR_CANCELLED = -59
-    CKERR_NOANIMATIONKEY = -121
-    CKERR_INVALIDINDEX = -122
-    CKERR_INVALIDANIMATION = -123
-
-    def __repr__(self):
-        return ErrorDescription.get(self.m_Value, "[Undefined] {:d}".format(self.m_Value))
-
diff --git a/PyCmo/VTReader.py b/PyCmo/VTReader.py
deleted file mode 100644
index 4a6694e..0000000
--- a/PyCmo/VTReader.py
+++ /dev/null
@@ -1,141 +0,0 @@
-import VTStruct, VTUtils, VTConstants
-import PyCmoMisc
-import struct, io, datetime, zlib
-import typing
-
-g_Header1Packer = struct.Struct('<iiIiiiii')
-g_Header2Packer = struct.Struct('<iiiiiiii')
-g_FileObjectPacker = struct.Struct('<iiii')
-
-class CKFileReader():
-
-    @staticmethod
-    def ReadFileHeaders(self: VTStruct.CKFile) -> VTConstants.CKERROR:
-        if self.m_Parser is None:
-            return VTConstants.CKERROR(VTConstants.CKERROR.CKERR_INVALIDPARAMETER)
-        parser = self.m_Parser
-
-        # ========== magic words ==========
-        magic_words = parser.GetReader()[0:4]
-        if magic_words != b'Nemo':
-            return VTConstants.CKERROR(VTConstants.CKERROR.CKERR_INVALIDFILE)
-        
-        # ========== read header1 ==========
-        if parser.GetSize() < 0x20:
-            return VTConstants.CKERROR(VTConstants.CKERROR.CKERR_INVALIDFILE)
-        header1 = list(g_Header1Packer.unpack(parser.GetReader().read(8 * 4)))
-
-        # check header1
-        if header1[5]:  # i don't know what is this fields stands for
-            header1 = list(0 for _ in range(8))
-
-        # virtools is too old to open this file. file is too new.
-        if header1[4] > 9:  # file version
-            return VTConstants.CKERROR(VTConstants.CKERROR.CKERR_OBSOLETEVIRTOOLS)
-
-        # ========== read header2 ==========
-        # file ver < 5 do not have second header
-        if header1[4] < 5:
-            header2 = list(0 for _ in range(8))
-        else:
-            if parser.GetSize() < 0x40:
-                return VTConstants.CKERROR(VTConstants.CKERROR.CKERR_INVALIDFILE)
-
-            header2 = g_Header2Packer.unpack(parser.GetReader().read(8 * 4))
-
-        # forcely reset too big product ver
-        if header2[5] >= 12:    # product version
-            header2[5] = 0
-            header2[6] = 0x1010000   # product build
-
-        # ========== assign value ==========
-        self.m_FileInfo.ProductVersion = header2[5]
-        self.m_FileInfo.ProductBuild = header2[6]
-        self.m_FileInfo.FileWriteMode.m_Value = header1[6]
-        self.m_FileInfo.CKVersion = header1[3]
-        self.m_FileInfo.FileVersion = header1[4]
-        self.m_FileInfo.FileSize = self.m_Parser.GetSize()
-        self.m_FileInfo.ManagerCount = header2[2]
-        self.m_FileInfo.ObjectCount = header2[3]
-        self.m_FileInfo.MaxIDSaved = header2[4]
-        self.m_FileInfo.Hdr1PackSize = header1[7]
-        self.m_FileInfo.Hdr1UnPackSize = header2[7]
-        self.m_FileInfo.DataPackSize = header2[0]
-        self.m_FileInfo.DataUnPackSize = header2[1]
-        self.m_FileInfo.Crc = header1[2]
-
-        # ========== crc and body unpacker ==========
-        # file version greater than 8 have crc feature and compression feature
-        if self.m_FileInfo.FileVersion >= 8:
-            # reset crc field of header
-            header1[2] = 0
-
-            # compute crc
-            gotten_crc = zlib.adler32(g_Header1Packer.pack(*header1), 0)
-
-            reader = parser.GetReader()
-            pos_cache = reader.tell()
-            reader.seek(8 * 4, io.SEEK_SET)
-            gotten_crc = zlib.adler32(reader.read(
-                8 * 4 + self.m_FileInfo.Hdr1PackSize + self.m_FileInfo.DataPackSize
-            ), gotten_crc)
-            reader.seek(pos_cache, io.SEEK_SET)
-
-            # compare crc
-            if gotten_crc != self.m_FileInfo.Crc:
-                return VTConstants.CKERROR(VTConstants.CKERROR.CKERR_FILECRCERROR)
-
-
-            # compare size to decide wheher use compress feature
-            if self.m_FileInfo.Hdr1UnPackSize != self.m_FileInfo.Hdr1PackSize:
-                # create a new parser for following analyze
-                parser = VTUtils.SmallZlibFileReader(parser, self.m_FileInfo.Hdr1PackSize, self.m_FileInfo.Hdr1UnPackSize)
-
-        # ========== object list read ==========
-        # file ver >= 7 have this features
-        if self.m_FileInfo.FileVersion >= 7:
-            self.m_SaveIDMax = self.m_FileInfo.MaxIDSaved
-            # resize
-            self.m_FileObjects = list(VTStruct.CKFileObject() for _ in range(self.m_FileInfo.ObjectCount))
-
-            # read data
-            reader = parser.GetReader()
-            for fileobj in self.m_FileObjects:
-                # set useless fields
-                fileobj.ObjPtr = None
-                fileobj.Name = None
-                fileobj.Data = None
-
-                # read basic fields
-                (fileobj.Object, cid, fileobj.FileIndex, namelen) = g_FileObjectPacker.unpack(
-                    reader.read(g_FileObjectPacker.size)
-                )
-                fileobj.ObjectCid.Set(cid)
-
-                # read name
-                if namelen > 0:
-                    fileobj.Name = reader.read(namelen).decode('utf-8', errors = 'ignore')
-                    
-        # ========== dep list read ==========
-        # only file ver >= 8, this sector is existed
-        if self.m_FileInfo.FileVersion >= 8:
-            pass
-
-
-    @staticmethod
-    def Load(self: VTStruct.CKFile, filename: str, load_flags: VTConstants.CK_LOAD_FLAGS) -> VTConstants.CKERROR:
-        # todo: clear first
-
-        # setup basic fields
-        self.m_FileName = filename
-        self.m_Flags = load_flags
-        
-        # setup parser
-        self.m_Parser = VTUtils.RawFileReader(filename)
-
-        # read header first
-        err = CKFileReader.ReadFileHeaders(self)
-
-        # todo: finish other read
-
-        return err
diff --git a/PyCmo/VTStruct.py b/PyCmo/VTStruct.py
deleted file mode 100644
index b9d45c0..0000000
--- a/PyCmo/VTStruct.py
+++ /dev/null
@@ -1,116 +0,0 @@
-import VTConstants, VTUtils
-import PyCmoMisc
-import datetime
-
-class CKGUID():
-    def __init__(self):
-        self.D1: int = 0
-        self.D2: int = 0
-    def __init__(self, d1: int, d2: int):
-        self.D1: int = d1
-        self.D2: int = d2
-    def __repr__(self):
-        return f"<CKGUID: 0x{self.D1:08X}, 0x{self.D2:08X}"
-    def __str__(self):
-        return self.__repr__()
-
-class CKFileInfo:
-    def __init__(self):
-        self.ProductVersion: int = 0
-        self.ProductBuild: int = 0
-
-        self.FileWriteMode: VTConstants.CK_FILE_WRITEMODE = VTConstants.CK_FILE_WRITEMODE(VTConstants.CK_FILE_WRITEMODE.CKFILE_WHOLECOMPRESSED)
-        
-        self.FileVersion: int = 0
-        self.CKVersion: int = 0
-
-        self.FileSize: int = 0
-        self.ObjectCount: int = 0
-        self.ManagerCount: int = 0
-        self.MaxIDSaved: int = 0
-
-        self.Crc: int = 0
-        
-        self.Hdr1PackSize: int = 0
-        self.Hdr1UnPackSize: int = 0
-        self.DataPackSize: int = 0
-        self.DataUnPackSize: int = 0
-
-    def GetProductBuildTuple(self) -> tuple[int]:
-        return (
-            (self.ProductBuild >> 24) & 0xff, 
-            (self.ProductBuild >> 16) & 0xff, 
-            (self.ProductBuild >> 8) & 0xff, 
-            self.ProductBuild & 0xff
-        )
-
-    def __repr__(self) -> str:
-        return f"""<CKFile: 
-    Version (File / CK): {self.FileVersion:d} / 0x{self.CKVersion:08X}
-    Product (Version / Build): {self.ProductVersion:d} / {'.0'.join(map(lambda x: str(x), self.GetProductBuildTuple()))}
-    Save Flags: {self.FileWriteMode}
-    File Size: {PyCmoMisc.OutputSizeHumanReadable(self.FileSize)}
-    Crc: 0x{self.Crc:08X}
-
-    Hdr1 (Pack / Unpack): {PyCmoMisc.OutputSizeHumanReadable(self.Hdr1PackSize)} / {PyCmoMisc.OutputSizeHumanReadable(self.Hdr1UnPackSize)}
-    Data (Pack / Unpack): {PyCmoMisc.OutputSizeHumanReadable(self.DataPackSize)} / {PyCmoMisc.OutputSizeHumanReadable(self.DataUnPackSize)}
-
-    Manager Count: {self.ManagerCount:d}
-    Object Count: {self.ObjectCount:d}
-    Max ID Saved: {self.MaxIDSaved:d}
->"""
-    def __str__(self) -> str:
-        return self.__repr__()
-
-class CKFileObject():
-    def __init__(self):
-        self.Object: VTConstants.CK_ID = 0
-        self.CreatedObject: VTConstants.CK_ID = 0
-        self.ObjectCid: VTConstants.CK_CLASSID = VTConstants.CK_CLASSID(VTConstants.CK_CLASSID.CKCID_OBJECT)
-        self.ObjPtr = None
-        self.Name: str = None
-        self.Data = None
-        self.PostPackSize: int = 0
-        self.PrePackSize: int = 0
-        self.Options: VTConstants.CK_FO_OPTIONS = VTConstants.CK_FO_OPTIONS(VTConstants.CK_FO_OPTIONS.CK_FO_DEFAULT)
-        self.FileIndex: int = 0
-        self.SaveFlags: VTConstants.CK_FILE_WRITEMODE = VTConstants.CK_FILE_WRITEMODE(0)
-
-    def __repr__(self) -> str:
-        return f'<{self.Name if self.Name else "[Anonymous]"}: {self.ObjectCid}>'
-    def __str__(self) -> str:
-        return self.__repr__()
-
-class CKFilePluginDependencies():
-    def __init__(self):
-        self.m_PluginCategory: int = 0
-        self.m_Guids: list[CKGUID] = []
-        self.ValidGuids: list[bool] = []
-        
-    def __repr__(self) -> str:
-        return repr(self.m_Guids)
-    def __str__(self) -> str:
-        return self.__repr__()
-
-class CKFile(object):
-    def __init__(self):
-        self.m_SaveIDMax: int = 0
-        self.m_FileObjects: list[CKFileObject] = []
-        self.m_ManagersData = []
-        self.m_PluginDep: list[CKFilePluginDependencies] = []
-        self.m_IndexByClassId: list[list[int]] = []
-        self.m_IncludedFiles: list[str] = []
-
-        self.m_FileInfo: CKFileInfo = CKFileInfo()
-
-        self.m_Flags: VTConstants.CK_LOAD_FLAGS = VTConstants.CK_LOAD_FLAGS(VTConstants.CK_LOAD_FLAGS.CK_LOAD_DEFAULT)
-        self.m_FileName: str = ''
-        self.m_Parser: VTUtils.UniversalFileReader = None
-
-        self.m_ReadFileDataDone: bool = False
-
-    def __repr__(self) -> str:
-        return repr(self.m_FileInfo)
-    def __str__(self) -> str:
-        return self.__repr__()
-
diff --git a/PyCmo/VTUtils.py b/PyCmo/VTUtils.py
deleted file mode 100644
index ed38ffa..0000000
--- a/PyCmo/VTUtils.py
+++ /dev/null
@@ -1,81 +0,0 @@
-import PyCmoMisc
-import zlib, io, mmap, os
-import typing
-
-class RawFileReader():
-    def __init__(self, filename: str):
-        self.__size: int = os.path.getsize(filename)
-        self.__fs = open(filename, 'rb')
-        self.__mm: mmap.mmap = mmap.mmap(self.__fs.fileno(), 0, access = mmap.ACCESS_READ)
-    
-    def __del__(self):
-        self.__mm.close()
-        del self.__mm
-        self.__fs.close()
-        del self.__fs
-
-    def GetSize(self) -> int:
-        return self.__size
-
-    def GetReader(self) -> mmap.mmap:
-        return self.__mm
-
-class LargeZlibFileReader():
-    def __init__(self, raw_reader: RawFileReader, comp_size: int, uncomp_size: int):
-        # set size
-        self.__size: int = uncomp_size
-
-        # create mmap
-        self.__mm: mmap.mmap = mmap.mmap(-1, -1, access = mmap.ACCESS_WRITE)
-        
-        # decompress data
-        reader = raw_reader.GetReader()
-        parser: zlib._Decompress = zlib.decompressobj()
-
-        buf = reader.read(io.DEFAULT_BUFFER_SIZE)
-        while buf:
-            self.__mm.write(parser.decompress(buf))
-            buf = reader.read(io.DEFAULT_BUFFER_SIZE)
-        self._mm.write(parser.flush())
-
-    def __del__(self):
-        self.__mm.close()
-        del self.__mm
-
-    def GetSize(self) -> int:
-        return self.__size
-
-    def GetReader(self) -> mmap.mmap:
-        return self.__mm
-
-class SmallZlibFileReader():
-    def __init__(self, raw_reader: RawFileReader, comp_size: int, uncomp_size: int):
-        # set size
-        self.__size: int = uncomp_size
-
-        # create io
-        self.__ss: io.BytesIO = io.BytesIO()
-
-        # decompress data
-        reader = raw_reader.GetReader()
-        parser: zlib._Decompress = zlib.decompressobj()
-
-        buf = reader.read(io.DEFAULT_BUFFER_SIZE)
-        while buf:
-            self.__ss.write(parser.decompress(buf))
-            buf = reader.read(io.DEFAULT_BUFFER_SIZE)
-        self.__ss.write(parser.flush())
-
-        # reset cursor
-        self.__ss.seek(0, io.SEEK_SET)
-
-    def __del__(self):
-        del self.__ss
-
-    def GetSize(self) -> int:
-        return self.__size
-
-    def GetReader(self) -> io.BytesIO:
-        return self.__ss
-
-UniversalFileReader = typing.Union[RawFileReader, LargeZlibFileReader, SmallZlibFileReader]
diff --git a/Unvirt/AccessibleValue.cpp b/Unvirt/AccessibleValue.cpp
index 31da055..21dca52 100644
--- a/Unvirt/AccessibleValue.cpp
+++ b/Unvirt/AccessibleValue.cpp
@@ -36,6 +36,16 @@ namespace Unvirt {
 			{ LibCmo::CK_FO_OPTIONS::CK_FO_REPLACEOBJECT, "CK_FO_REPLACEOBJECT" },
 			{ LibCmo::CK_FO_OPTIONS::CK_FO_DONTLOADOBJECT, "CK_FO_DONTLOADOBJECT" }
 			};
+			const EnumDescPairArray<LibCmo::CK_PLUGIN_TYPE> CK_PLUGIN_TYPE{
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_BITMAP_READER, "CKPLUGIN_BITMAP_READER" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_SOUND_READER, "CKPLUGIN_SOUND_READER" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_MODEL_READER, "CKPLUGIN_MODEL_READER" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_MANAGER_DLL, "CKPLUGIN_MANAGER_DLL" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_BEHAVIOR_DLL, "CKPLUGIN_BEHAVIOR_DLL" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_RENDERENGINE_DLL, "CKPLUGIN_RENDERENGINE_DLL" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_MOVIE_READER, "CKPLUGIN_MOVIE_READER" },
+			{ LibCmo::CK_PLUGIN_TYPE::CKPLUGIN_EXTENSION_DLL, "CKPLUGIN_EXTENSION_DLL" }
+			};
 		}
 
 #pragma endregion
diff --git a/Unvirt/AccessibleValue.hpp b/Unvirt/AccessibleValue.hpp
index ac235b7..82f8127 100644
--- a/Unvirt/AccessibleValue.hpp
+++ b/Unvirt/AccessibleValue.hpp
@@ -18,6 +18,7 @@ namespace Unvirt {
 			extern const EnumDescPairArray<LibCmo::CK_FILE_WRITEMODE> CK_FILE_WRITEMODE;
 			extern const EnumDescPairArray<LibCmo::CK_LOAD_FLAGS> CK_LOAD_FLAGS;
 			extern const EnumDescPairArray<LibCmo::CK_FO_OPTIONS> CK_FO_OPTIONS;
+			extern const EnumDescPairArray<LibCmo::CK_PLUGIN_TYPE> CK_PLUGIN_TYPE;
 		}
 
 		template<typename TEnum>
diff --git a/Unvirt/Unvirt.cpp b/Unvirt/Unvirt.cpp
index bdd11d4..ed9b681 100644
--- a/Unvirt/Unvirt.cpp
+++ b/Unvirt/Unvirt.cpp
@@ -9,9 +9,9 @@ int main(int argc, char* argv[]) {
 	Unvirt::TerminalHelper::EnsureTerminalColor();
 	Unvirt::TerminalHelper::EnsureTerminalEncoding();
 
-	LibCmo::Utils::VirtoolsContext vtctx;
+	LibCmo::Utils::VirtoolsEnvironment vtctx;
 	LibCmo::CKFile vtfile(vtctx);
-	vtfile.Load("Language.old.nmo", LibCmo::CK_LOAD_FLAGS::CK_LOAD_DEFAULT);
+	LibCmo::CKERROR err = vtfile.Load("Language.old.nmo", LibCmo::CK_LOAD_FLAGS::CK_LOAD_DEFAULT);
 
 	Unvirt::StructFormatter::PrintCKFileInfo(vtfile.m_FileInfo);
 
diff --git a/libcmo21.sln b/libcmo21.sln
index 6275dfe..d2770dc 100644
--- a/libcmo21.sln
+++ b/libcmo21.sln
@@ -3,8 +3,6 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
 VisualStudioVersion = 16.0.31702.278
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{888888A0-9F3D-457C-B088-3A5042F75D52}") = "PyCmo", "PyCmo\PyCmo.pyproj", "{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}"
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "LibCmo", "LibCmo\LibCmo.vcxproj", "{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}"
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Unvirt", "Unvirt\Unvirt.vcxproj", "{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}"
@@ -14,36 +12,24 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Unvirt", "Unvirt\Unvirt.vcx
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
 		Debug|x64 = Debug|x64
 		Debug|x86 = Debug|x86
-		Release|Any CPU = Release|Any CPU
 		Release|x64 = Release|x64
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}.Release|x64.ActiveCfg = Release|Any CPU
-		{ADC519E8-5F1B-427D-8E5C-1FABCB6147FB}.Release|x86.ActiveCfg = Release|Any CPU
-		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Debug|Any CPU.ActiveCfg = Debug|Win32
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Debug|x64.ActiveCfg = Debug|x64
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Debug|x64.Build.0 = Debug|x64
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Debug|x86.ActiveCfg = Debug|Win32
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Debug|x86.Build.0 = Debug|Win32
-		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Release|Any CPU.ActiveCfg = Release|Win32
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Release|x64.ActiveCfg = Release|x64
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Release|x64.Build.0 = Release|x64
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Release|x86.ActiveCfg = Release|Win32
 		{70F64F8D-099C-4C21-B29C-0A8F1E22FB2E}.Release|x86.Build.0 = Release|Win32
-		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Debug|Any CPU.ActiveCfg = Debug|Win32
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Debug|x64.ActiveCfg = Debug|x64
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Debug|x64.Build.0 = Debug|x64
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Debug|x86.ActiveCfg = Debug|Win32
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Debug|x86.Build.0 = Debug|Win32
-		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Release|Any CPU.ActiveCfg = Release|Win32
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Release|x64.ActiveCfg = Release|x64
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Release|x64.Build.0 = Release|x64
 		{77E7ADB6-0D0C-4BA4-8DE7-A284C7F83941}.Release|x86.ActiveCfg = Release|Win32