Black Ops Zombie Maps Help?!?

i bought Black ops off Amazon, so i think the edition is american. it is the hardened one so it came with the zombie maps code. the code doesn't work (im assuming it's because im in australia and the game is american). so i decided to gameshare with someone (ps3). i download and install the maps but they're not there 4 me 2 play. i tried again and the install and everything works fine, but they don't show up in the maps 2 play!!! PLZ HELPP!! much appreciated. :)Black Ops Zombie Maps Help?!?
Bob Smith is right.

You can free yourself from the chair in the beginning.

Use the buttons that you use for shooting. (L,R,L,R,...)

Not throwing grenades.

Then use the computer.

Type "3arc unlock"

And Wallah!
at the main menu press LT and RT until your character gets up from the chair. than walk to the left and there should be a computer. go up to it and hold x. when it gives you the option to type in a code typein "3arc unlock" than press enter. go back to the map select menu and they should be there. hope this helps!!Black Ops Zombie Maps Help?!?
you need to beat the campaign. Because as if every COD4+ game, you get a "bonus" level for beating the campaign. So just beat the campaign and you should get the zombies level "five" and the extra COD 5 maps
Definitely what they said. Beat the campaign and if that doesn't work use the computer to unlock at main menu.Black Ops Zombie Maps Help?!?
Oh, use the secret computer.
Same thing happened to me, the codes only worked a day after i bought it
maybe you have to beat the game first like the pentagon map