LOL, I think you'll find he's on about the PC version, but nice post!
Decrypt Blu-Ray disk, extract files and edit the options (cvars) to enable cheats. Blank Blu-Ray disk, burn files to the blank blu-ray disk using a blu-ray burner. Cod4 cheats for the ps3 can't be patched this way. Stuz post is detailed so check it out. Its allll gooood!