Easiest way you can do that is to delete your account from the system which you will have to go to Sony entertainment website for you remove the account through the web which it will be more easier to remove instead of restoring your system. if it's for Xbox i think you can do the same thing with it but on the Microsoft website.
Custom maps are only available for PC.
Sadly yes but you can save the maps in another file and then put it back in the custom edition you reinstalled.
Big zombies
It started with the Nazi Zombies, but more maps have been added. The Black Ops has 11 different maps available and some are not Nazi zombies but other kinds of zombies
Just COD Zombies. You can get all the maps by downloading the latest version.
The World at War zombies have 3 map packs adding one new zombie map per pack. See call of duty world at war link
You can't read rules for custom maps. They will be at the start or on the forum page.
in the menu for making a skirmish, one of the tabs can be changed to custom maps. change it to custom maps.
yes it does it comes with 4 maps. i have it. but, it isn't Nazi zombies but its zombies.
Not to get the DLC maps or for the Wii to get the PS3 and Xbox 360 maps
You do not The Nintendo Wii does not have new Zombie maps
unlikely