-TTG_Jtag- wrote Mate Its So Much Better If It Was Your Own Gamesave
So Go To Campaign
Start It
When You Finish The First Little Bit On The 1st Mission Save It Drag It Into Modio Do Wat
You Want Then Put It Back Into Ur Xbox Start MW2 Campaign Should Be Where U Saved It And Modded

Is he using a premodded?? he didn't say. If so yeah he'll have to make a new save cause the premodded will already be corrupted.