Unlock full versions of XBLA games I'm sure they'll patch this soon though..
- Download the XBLA demo of these games
- Launch your Modern Warfare 2 game from the DVD drive
- Stay on the main screen (where is says "press start")
- Then push " X guide" button
- Select "quick start" and select your XBLA game
Works so far with Metal Slug 3, Fatal Fury Special, and Samurai Showdown
Could work with more?