well if you can make a nice wall hak for mw2 or mw3.......but not the same wally, make a nice one that allow you to see the player and not the bones or boxes!and you can add (i don't know if is possible, but if you want a challange XD) a jump hack....that allow you to reach position on the map (roof of building) very smart to do some sniping XD!
good luck let me see what you can do!