Well if you have ftp access, you can put your Game disc into your xbox, and go into the D drive, then maps, and they're all in there. If you've copied the game to your hard drive, then it's probably in E/F:\Games\Halo 2\Maps. If you haven't got ftp access, then go to www.xbox-scene.com
Alright, but how do I get to the dashboard with the game still in there? If I leave the game in, then it launches. Even when I turn the auto-launch feature off.