1) Use Hassan's method. Here
2) Be sure to launch the game through NWZLauncher.exe only.
3) Delete GameGuard folder, and the file GameGuard.des who is located within Binaries folder.
4) Replace with the files in the archive.
5) Make the "GameGuard.des" file who is in Binaries folder as "Read-only".
6) Run the game and start the memory changer is inside the archive.