Backup Multiplayer Data

To backup your multiplayer profile is easy. All you have to do is navigate to the place where your Call of Duty 4 is installed and find your user profile. EG: C:\Program Files\Activision\Call of Duty 4 - Modern Warfare\players\profiles\User Inside that folder find the files called mpdata and configmp. mpdata contains all the xp and kills, headshots etc. configmp contains all your keybinds and the names of your custom classes. Copy these two files and paste them somewhere else, or save them to a disc/external device. You can then re-install Call of Duty 4 - Modern Warfare. Then go into the game and make a profile. Then exit the game. Then find the same profile again on your hard drive and copy your files over the ones existing in C:\Program Files\Activision\Call of Duty 4 - Modern Warfare\players\profiles\User. After that enter game and it should work. It is also possible to have many accounts with the same stats and keybinds in this way.

Thanks, Pwnalizer.

What about cd-key?

Nice Work @pwnalizer
Keep it up