Call of Duty - How to mod it?

Hi,

I and my friend would like to have a bit of fun modding our precious call of duty game :) but we don't want to get ban.

Questions:

1st Can I make a lobby hack for me and my friend to prestige and then unmod the game without getting ban
2nd Can in Zombies (Black Ops 1 or 2) we have ex unlimited ammo or god mode without getting ban?
3rd How to not get ban? Can I fake an ID or anything so my current PSN account or my console get untouched?

Thanks you guys, please, just leave if you don't wish to help me as it could help a lot of person.