How do I use the new maps and the zombie map on black ops?

I just downloaded the new map packs for black ops but how do I use the new multiplayer maps?? and I tried using the zombie map ascension but won't let me use it.. i havent completed the campaign yet nor tried the zombie map kino der toten, if that helps.. ThanksHow do I use the new maps and the zombie map on black ops?
http://www.youtube.com/watch?v=CRf4nseW-F0



is this what you want?How do I use the new maps and the zombie map on black ops?
If it does not work, first try restarting your Xbox. Then run Cod and see if it works. If not try beating the campaign, or cheat. Heres the link on how to cheat: http://www.youtube.com/watch?v=xMs6JOkQf鈥?/a>

If it STILL doesnt work try deleting the map pack then reinstalling it.How do I use the new maps and the zombie map on black ops?
well, have you typed in the cheat code for all zombie map unlocks at the main menu? and you can play the new maps in split screen offline play (because you can CHOOSE what map you want to play there). But for online, you have to be in a party that have downloaded the expansion pack, and you have to vote for the map too.
http://www.youtube.com/watch?v=WNkRFiYDL鈥?/a>

All you need to do is restart xbox, start multiplayer and do the first strike playlist.



That vid is sick.