Ok, I have been getting this a lot. Its mainly from people who are ignorant, won’t listen, or just don’t understand. So to clarify what you can, and can NOT do, and the reason for it, continue to read…

On MW2 1.11, anyone who knew how could “edit patches”, make all this stuff and run on MW2 freely, and play with others while doing so. During this time, derektrotter, blackstorm, and elitemossy were among the most popular “patch makers”. When people make patches, they were actually programming. Call of Duty uses GSC for its scripting language. That stands for Game Script Coding.

IW were fed up with this, and it took a year to get them to fix it. When MW2 1.12 came out, it was aimed at stopping this once and for all.

To accomplish this, they put a copy of the patch_mp.ff in the self executable. The self is basically the game program, like a xex on xbox, a exe on windows, and a elf on Wii. What the new security basically did was do a checksum (google to learn) on the script being loaded, and a checksum on the one inside the self. If they didn’t match, the game would over-ride it and use the internal one.