Hey, this originally stems from the ps3 scene so give allot of credit to them. First extract you profile to your desktop, and open it in le fluffie, extract 41560817.gpd to your desktop. Open this in your favourite hex editor.
Search for SEMV in ascii
Now keep searching until you find one where if you go 1 line under the V and 1 across you should get 3F/40 assuming your on medium sensitivity.
Change this to 7F and save the gpd, open up your profile in le fluffie and overwrite your old gpd with the new one, go to the Security tab and click fix. Now insert it back onto your memory card and boot up MW2, ta da no recoilz(when someone finds the disadvantage post it)!