http://wiki.beryl-project.org/index....buntu/Edgy/XGL
http://ubuntuforums.org/showthread.php?t=291464
http://ubuntuforums.org/showthread.php?p=1843428
There's something to start off with..I'm sure there are tons of how-tos, faq pages (with answers) and self-written examples about how XGL, ATI's fglrx drivers, 3d desktops, Windows games etc. are made work on Linux (Ubuntu or any other distribution, and specifically Ubuntu) so no sense in writing all that again (especially if somebody has written howtos and tested that they work). Using the Search form here at LQ is a good idea too, I'm sure there are existing threads about this already. ATI's driver installation is easier if you use Ubuntu's fglrx package (open Synaptic from the menu, search fglrx package and if you can't find it, make sure you've got the correct reposities enabled -- more about that is at Ubuntu's site/wiki), but it's almost as easy using the installer from ATI's site (I've always found it easier using the Ubuntu way) and ATI has instructions for that.