Hey man, saw your post about not having played Dash of Destruction. If you download THIS file, extract it and burn it to a CD-R using some software like ImgBurn, it'll allow you to play it!
The disc contains all the free games from XBLA, so it's not illegal or dodgy in any way - there's no drm protection associated with these 5 games as they were always intended to be free. So you're not running any risks of doing anything against Microsoft's T&C's either. Using this disc, you'll also be able to give the no longer available Yaris a try if you feel like it too.
The games on the disc are: - Aegis Wing
- Dash of Destruction
- Hexic HD