Is there any way to get infinite ammo, and possibly other things, like change game speed, on mw2 split screen?

I have looked all across the internet, and sadly, I do not find anything that tells me how to mod split screen. The only things I have found are how to get 10th Prestige, Gold Desert Eagles, and Hacked Custom Classes. Can anyone on the Internnet please tell me how to get infinite ammo, super jump and sprint, and how to change the game speed in split screen on modern warfare 2???!!!