I am assuming that you have to get a program that allows you to edit maps and stuff like that. It is possible without being a Treyarch imployee because people have made many custom Nazi Zombie maps.
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Not if your game disc is not in that Xbox 360 or if the maps need to be downloaded to it. I think what you want to know is do you need your own copy of the DLC Zombie Maps or if you can somehow use those that are on someone else's Xbox 360 while you are playing online with them and you can not. You need to have the map in your harddrive or on your game disc to play it.
You can go multi player and look up zombie mod servers all of them have the zm_(mapname) maps so you can search by zombie in server name or zm_ in server map. Unless you have your own server that you run you cannot play zombie mod with bots.
There is no zombie survival mode in Modern Warfare 2, that was just a feature in Call of Duty: World at War, developed by Treyarch.However there is a special operations mode located on the left of the campaign mode, this can be played online, on your own or 2-4 player. This game mode allows you to defend a whole map and is like zombie mode except that you don't buy your guns, they are already there and all maps are there. Also they are not zombies but actual people and trucks and jeeps come on some missions too. You can use many weapons including the Predator missile.
If it wont let you then you cant create your own jordan shoe.
You can't. It has to be Roblox.