How do I hack my Modern Warfare 2 split-screen data on Xbox 360?

I already know how to do Prestiges and levels, but I can't figure out how to do stuff like Laser dot, unlimited ammo, akimbo fal, and things of that nature. Is there any way I can do this with a USB? I have looking at Modio, and the descriptions say what I'm looking for, but when i check the details, after changing the profile and device ID, it still says that it is for a different profile. I tried it anyway, and it didn't work, just as suspected. Is there any program i can use to mod my split-screen data?