If it lags all the time and not just in the mod, it is most likely the computer. Try using those programs i posted, and if that doesn't speed it up to a playable rate, then you can either upgrade your comp, or buy a new one..
Hi I try the game booster work out pretty well so thank you very much!
Its work better anyway!
okay i dont know howmuch mb internet you ahve but if you open just only steam not mw2 or somthing else then do options downloads +clouds
and then set them to the good settings dont know if it helps but you can give it an go ;D