A glitch has been found in Call of Duty 2 which lets players customise multiplayer games via Xbox Live.
To exploit the glitch, all you have to do is grab someone else set up a system link game, selecting player limit, game type, level and time limit.
Then get someone to ask you to join a different game, and accept. But then decline to log out when you're asked to - and hey presto, you will become the host of an Xbox Live match. All the settings you selected when setting up the system link game will apply.
The glitch was discovered by a poster on the Xbox forums who goes by the name of DUKEforLIFE. Head on over there to find out how to get in on the action.