Black Ops - Combat Training Glitch Any Game Mode

NEW METHOD (eaiser): 1. Go into a private match and invite a friend.
2. Change the game mode to Search & Destroy (or whatever you want) and edit the game settings to the settings you want (I didn't get any custom settings to work in the game)
3. Click switch lobby then hover over combat training (don't click it yet)
4. Click combat training, then up and then X/A (to start game) THIS MUST BE DONE QUICKLY
5. While it's loading, dashboard (quit game) and then your friend will be in a combat training with the game mode as SnD