diff --git a/source/Irrlicht/CFileSystem.cpp b/source/Irrlicht/CFileSystem.cpp
index d0bc7c9c2..5432182a2 100644
--- a/source/Irrlicht/CFileSystem.cpp
+++ b/source/Irrlicht/CFileSystem.cpp
@@ -125,12 +125,12 @@ IReadFile* CFileSystem::createAndOpenFile(const io::path& filename)
 
 //! Creates an IReadFile interface for treating memory like a file.
 IReadFile* CFileSystem::createMemoryReadFile(const void* memory, s32 len,
-		const io::path& fileName, bool deleteMemoryWhenDropped)
+		const io::path& fileName, bool deleteMemoryWhenDropped, bool makeLocalCopy)
 {
 	if (!memory)
 		return 0;
 	else
-		return new CMemoryReadFile(memory, len, fileName, deleteMemoryWhenDropped);
+		return new CMemoryReadFile(memory, len, fileName, deleteMemoryWhenDropped, makeLocalCopy);
 }
 
 
@@ -147,12 +147,12 @@ IReadFile* CFileSystem::createLimitReadFile(const io::path& fileName,
 
 //! Creates an IReadFile interface for treating memory like a file.
 IWriteFile* CFileSystem::createMemoryWriteFile(void* memory, s32 len,
-		const io::path& fileName, bool deleteMemoryWhenDropped)
+		const io::path& fileName, bool deleteMemoryWhenDropped, bool makeLocalCopy)
 {
 	if (!memory)
 		return 0;
 	else
-		return new CMemoryWriteFile(memory, len, fileName, deleteMemoryWhenDropped);
+		return new CMemoryWriteFile(memory, len, fileName, deleteMemoryWhenDropped, makeLocalCopy);
 }
 
 
diff --git a/source/Irrlicht/CFileSystem.h b/source/Irrlicht/CFileSystem.h
index 5c542b363..6a43f4bcb 100644
--- a/source/Irrlicht/CFileSystem.h
+++ b/source/Irrlicht/CFileSystem.h
@@ -34,13 +34,13 @@ class CFileSystem : public IFileSystem
 	virtual IReadFile* createAndOpenFile(const io::path& filename) _IRR_OVERRIDE_;
 
 	//! Creates an IReadFile interface for accessing memory like a file.
-	virtual IReadFile* createMemoryReadFile(const void* memory, s32 len, const io::path& fileName, bool deleteMemoryWhenDropped = false) _IRR_OVERRIDE_;
+	virtual IReadFile* createMemoryReadFile(const void* memory, s32 len, const io::path& fileName, bool deleteMemoryWhenDropped = false, bool makeLocalCopy=false) _IRR_OVERRIDE_;
 
 	//! Creates an IReadFile interface for accessing files inside files
 	virtual IReadFile* createLimitReadFile(const io::path& fileName, IReadFile* alreadyOpenedFile, long pos, long areaSize) _IRR_OVERRIDE_;
 
 	//! Creates an IWriteFile interface for accessing memory like a file.
-	virtual IWriteFile* createMemoryWriteFile(void* memory, s32 len, const io::path& fileName, bool deleteMemoryWhenDropped=false) _IRR_OVERRIDE_;
+	virtual IWriteFile* createMemoryWriteFile(void* memory, s32 len, const io::path& fileName, bool deleteMemoryWhenDropped=false, bool makeLocalCopy=false) _IRR_OVERRIDE_;
 
 	//! Opens a file for write access.
 	virtual IWriteFile* createAndWriteFile(const io::path& filename, bool append=false) _IRR_OVERRIDE_;
diff --git a/source/Irrlicht/CMemoryFile.cpp b/source/Irrlicht/CMemoryFile.cpp
index be2794f7a..97e5f56ef 100644
--- a/source/Irrlicht/CMemoryFile.cpp
+++ b/source/Irrlicht/CMemoryFile.cpp
@@ -10,9 +10,26 @@ namespace irr
 namespace io
 {
 
+//! copy routine to allow for local allocator to hold memory
+const void * dupe(const void *m, long len, bool clone) {
+	if (clone) {
+		c8* b = new c8[len];
+		if (m) memcpy(b, m, len);
+		return b;
+	}
+	return m;
+}
+void * dupe(void *m, long len, bool clone) {
+	if (clone) {
+		c8* b = new c8[len];
+		if (m) memcpy(b, m, len);
+		return b;
+	}
+	return m;
+}
 
-CMemoryReadFile::CMemoryReadFile(const void* memory, long len, const io::path& fileName, bool d)
-: Buffer(memory), Len(len), Pos(0), Filename(fileName), deleteMemoryWhenDropped(d)
+CMemoryReadFile::CMemoryReadFile(const void* memory, long len, const io::path& fileName, bool d, bool c)
+: Buffer(dupe(memory,len,c)), Len(len), Pos(0), Filename(fileName), deleteMemoryWhenDropped(d||c)
 {
 	#ifdef _DEBUG
 	setDebugName("CMemoryReadFile");
@@ -90,8 +107,8 @@ const io::path& CMemoryReadFile::getFileName() const
 }
 
 
-CMemoryWriteFile::CMemoryWriteFile(void* memory, long len, const io::path& fileName, bool d)
-: Buffer(memory), Len(len), Pos(0), Filename(fileName), deleteMemoryWhenDropped(d)
+CMemoryWriteFile::CMemoryWriteFile(void* memory, long len, const io::path& fileName, bool d, bool c)
+: Buffer(dupe(memory,len,c)), Len(len), Pos(0), Filename(fileName), deleteMemoryWhenDropped(d||c)
 {
 	#ifdef _DEBUG
 	setDebugName("CMemoryWriteFile");
diff --git a/source/Irrlicht/CMemoryFile.h b/source/Irrlicht/CMemoryFile.h
index 028e3e15a..c59c0f7d8 100644
--- a/source/Irrlicht/CMemoryFile.h
+++ b/source/Irrlicht/CMemoryFile.h
@@ -23,7 +23,7 @@ namespace io
 	public:
 
 		//! Constructor
-		CMemoryReadFile(const void* memory, long len, const io::path& fileName, bool deleteMemoryWhenDropped);
+		CMemoryReadFile(const void* memory, long len, const io::path& fileName, bool deleteMemoryWhenDropped, bool makeLocalCopy = false);
 
 		//! Destructor
 		virtual ~CMemoryReadFile();
@@ -60,7 +60,7 @@ namespace io
 	public:
 
 		//! Constructor
-		CMemoryWriteFile(void* memory, long len, const io::path& fileName, bool deleteMemoryWhenDropped);
+		CMemoryWriteFile(void* memory, long len, const io::path& fileName, bool deleteMemoryWhenDropped, bool makeLocalCopy = false);
 
 		//! Destructor
 		virtual ~CMemoryWriteFile();