A few weeks ago, I wrote this tutorial for a guy that asked me how to make an MW3 hack, so it's MW3 based, but basic "rules" apply to MW2 hacking, too..
I suggest you not to use Detours on the Steam version, becuase VAC easily detects them..
https://www.virustotal.com/en/file/9...is/1405423376/
C++InternalHack.pdf - Jotti's malware scan