diff --git a/common/lc_library.cpp b/common/lc_library.cpp
index 276dd5c1..33e12813 100644
--- a/common/lc_library.cpp
+++ b/common/lc_library.cpp
@@ -921,10 +921,8 @@ bool lcPiecesLibrary::LoadPiece(PieceInfo* Info)
 
 	if (!Loaded && !mCurrentModelPath.isEmpty())
 	{
-		QFileInfo FileInfo(QDir(mCurrentModelPath), Info->m_strName);
-
-		lcDiskFile PieceFile;
-		if (PieceFile.Open(FileInfo.absoluteFilePath().toLatin1().constData(), "rt")) // todo: qstring
+		lcMemFile PieceFile;
+		if (LoadAndInlineFile(Info->m_strName, PieceFile))
 		{
 			const char* OldLocale = setlocale(LC_NUMERIC, "C");
 			Loaded = ReadMeshData(PieceFile, lcMatrix44Identity(), 16, TextureStack, MeshData, LC_MESHDATA_SHARED, false);
@@ -1408,6 +1406,32 @@ bool lcPiecesLibrary::LoadPrimitive(int PrimitiveIndex)
 	return true;
 }
 
+bool lcPiecesLibrary::LoadAndInlineFile(const char* FileName, lcMemFile& File)
+{
+	QFileInfo FileInfo(QDir(mCurrentModelPath), FileName);
+
+	if (!FileInfo.isFile())
+		return false;
+
+	Project TempProject;
+
+	if (!TempProject.Load(FileInfo.absoluteFilePath()))
+		return false;
+
+	TempProject.InlineAllModels();
+
+	QByteArray Data;
+	QTextStream Stream(&Data);
+	TempProject.Save(Stream);
+	Stream.flush();
+
+	File.Seek(0, SEEK_SET);
+	File.WriteBuffer(Data.constData(), Data.size());
+	File.Seek(0, SEEK_SET);
+
+	return true;
+}
+
 bool lcPiecesLibrary::ReadMeshData(lcFile& File, const lcMatrix44& CurrentTransform, lcuint32 CurrentColorCode, lcArray<lcLibraryTextureMap>& TextureStack, lcLibraryMeshData& MeshData, lcMeshDataType MeshDataType, bool Optimize)
 {
 	char Buffer[1024];
@@ -1667,7 +1691,7 @@ bool lcPiecesLibrary::ReadMeshData(lcFile& File, const lcMatrix44& CurrentTransf
 						if (strcmp(Info->m_strName, FileName))
 							continue;
 
-						if (mZipFiles[LC_ZIPFILE_OFFICIAL])
+						if (mZipFiles[LC_ZIPFILE_OFFICIAL] && Info->mZipFileType != LC_NUM_ZIPFILES)
 						{
 							lcMemFile IncludeFile;
 
@@ -1693,13 +1717,11 @@ bool lcPiecesLibrary::ReadMeshData(lcFile& File, const lcMatrix44& CurrentTransf
 
 					if (!Loaded && !mCurrentModelPath.isEmpty())
 					{
-						QFileInfo FileInfo(QDir(mCurrentModelPath), OriginalFileName);
-
-						lcDiskFile IncludeFile;
-						if (IncludeFile.Open(FileInfo.absoluteFilePath().toLatin1().constData(), "rt")) // todo: qstring
+						lcMemFile IncludeFile;
+						if (LoadAndInlineFile(OriginalFileName, IncludeFile))
 						{
 							const char* OldLocale = setlocale(LC_NUMERIC, "C");
-							Loaded = ReadMeshData(IncludeFile, IncludeTransform, ColorCode, TextureStack, MeshData, MeshDataType, Optimize);
+							Loaded = ReadMeshData(File, IncludeTransform, ColorCode, TextureStack, MeshData, MeshDataType, Optimize);
 							setlocale(LC_NUMERIC, OldLocale);
 						}
 					}
diff --git a/common/lc_library.h b/common/lc_library.h
index 53d77163..d154de13 100644
--- a/common/lc_library.h
+++ b/common/lc_library.h
@@ -186,6 +186,7 @@ protected:
 
 	int FindPrimitiveIndex(const char* Name) const;
 	bool LoadPrimitive(int PrimitiveIndex);
+	bool LoadAndInlineFile(const char* FileName, lcMemFile& File);
 
 	QString mCachePath;
 	QString mCurrentModelPath;
diff --git a/common/lc_model.cpp b/common/lc_model.cpp
index bc4470ca..9f143f44 100644
--- a/common/lc_model.cpp
+++ b/common/lc_model.cpp
@@ -2180,6 +2180,50 @@ void lcModel::MoveSelectionToModel(lcModel* Model)
 	ClearSelectionAndSetFocus(ModelPiece, LC_PIECE_SECTION_POSITION);
 }
 
+void lcModel::InlineAllModels()
+{
+	for (;;)
+	{
+		bool Inlined = false;
+
+		for (int PieceIdx = 0; PieceIdx < mPieces.GetSize(); )
+		{
+			lcPiece* Piece = mPieces[PieceIdx];
+
+			if (!Piece->mPieceInfo->IsModel())
+			{
+				PieceIdx++;
+				continue;
+			}
+
+			mPieces.RemoveIndex(PieceIdx);
+
+			lcArray<lcModelPartsEntry> ModelParts;
+			Piece->mPieceInfo->GetModelParts(Piece->mModelWorld, Piece->mColorIndex, ModelParts);
+
+			for (int InsertIdx = 0; InsertIdx < ModelParts.GetSize(); InsertIdx++)
+			{
+				lcModelPartsEntry& Entry = ModelParts[InsertIdx];
+
+				lcPiece* NewPiece = new lcPiece(Entry.Info);
+
+				NewPiece->Initialize(Entry.WorldMatrix, Piece->GetStepShow());
+				NewPiece->SetColorIndex(Entry.ColorIndex);
+				NewPiece->UpdatePosition(mCurrentStep);
+
+				InsertPiece(NewPiece, PieceIdx);
+				PieceIdx++;
+			}
+
+			delete Piece;
+			Inlined = true;
+		}
+
+		if (!Inlined)
+			break;
+	}
+}
+
 void lcModel::InlineSelectedModels()
 {
 	lcArray<lcObject*> NewPieces;
diff --git a/common/lc_model.h b/common/lc_model.h
index 6ff4b471..deea451f 100644
--- a/common/lc_model.h
+++ b/common/lc_model.h
@@ -188,6 +188,7 @@ public:
 	void SetPieceSteps(const QList<QPair<lcPiece*, lcStep>>& PieceSteps);
 
 	void MoveSelectionToModel(lcModel* Model);
+	void InlineAllModels();
 	void InlineSelectedModels();
 
 	lcGroup* AddGroup(const QString& Prefix, lcGroup* Parent);
diff --git a/common/project.cpp b/common/project.cpp
index 7854abf7..790ec768 100644
--- a/common/project.cpp
+++ b/common/project.cpp
@@ -326,6 +326,16 @@ bool Project::Save(const QString& FileName)
 	lcGetPiecesLibrary()->SetCurrentModelPath(QFileInfo(FileName).absolutePath());
 
 	QTextStream Stream(&File);
+	bool Success = Save(Stream);
+
+	mFileName = FileName;
+	mModified = false;
+
+	return Success;
+}
+
+bool Project::Save(QTextStream& Stream)
+{
 	bool MPD = mModels.GetSize() > 1;
 
 	for (int ModelIdx = 0; ModelIdx < mModels.GetSize(); ModelIdx++)
@@ -342,9 +352,6 @@ bool Project::Save(const QString& FileName)
 			Stream << QLatin1String("0 NOFILE\r\n");
 	}
 
-	mFileName = FileName;
-	mModified = false;
-
 	return true;
 }
 
@@ -381,6 +388,16 @@ void Project::Merge(Project* Other)
 	mModified = true;
 }
 
+void Project::InlineAllModels()
+{
+	mModels[0]->InlineAllModels();
+
+	for (int ModelIdx = 1; ModelIdx < mModels.GetSize(); ModelIdx++)
+		delete mModels[ModelIdx];
+
+	mModels.SetSize(1);
+}
+
 void Project::GetModelParts(lcArray<lcModelPartsEntry>& ModelParts)
 {
 	if (mModels.IsEmpty())
diff --git a/common/project.h b/common/project.h
index 7dc503a8..3007f96f 100644
--- a/common/project.h
+++ b/common/project.h
@@ -55,8 +55,11 @@ public:
 	lcModel* CreateNewModel(bool ShowModel);
 	QString GetNewModelName(QWidget* ParentWidget, const QString& DialogTitle, const QString& CurrentName, const QStringList& ExistingModels) const;
 	void ShowModelListDialog();
+	void InlineAllModels();
+
 	bool Load(const QString& FileName);
 	bool Save(const QString& FileName);
+	bool Save(QTextStream& Stream);
 	void Merge(Project* Other);
 
 	void SaveImage();