Okay here is what you do.
Go to black ops
Go to theater
Press Y ( For Xbox )
Then go over to recent players
Go to the last one and load it while it is loading and has a gray box with a spinning circle.
Then you should have a checkerboard in Theater.
Press Y again and go over to one of you friends ( or anyone ) and load a game mode from their file share.
( This will only work from someone else's file share. )
Then you will be in private match with a checkerboard map. Have fun!
- Administration