one
There are no "cheat codes" for MW2 but if you use a mod system where as you put your account in your computer, mod it, and put it back. you can activate "god mode" which you become invincible but if you are not host of the lobby it will kick you from it or you xbox will restart.
Yes
You can either your invedit a mod or you could use an in game mod called too many items
This depends on what you want. If you want infinite resources, use the Toomanyitems mod. If you want a new dimension to your world, use the Aether mod. If you want a bigger world, use the Dynamic Height mod. If you just want to put new resources into your game, use the Buildcraft mod. Here's a fun mod. The Clay Soldiers Mod lets you stage the most epic battles that are so small, you can stage them in your own backyard! I know there are many more mods, but these are the ones that I think are the best.
Yes you can.
Yes. I use it, and many other people use it and will tell you the same.
yes it is easy to use ump45
No. I use that mod and I don't have mod loader.
better sprinting mod
there is none
You can use either.
No, you can't. But however, you can run the "Too Many item's" mod at a separate rate, as well as the Client, but not at the same time.