The older versions of the ATI drivers wont work, and you cant really go back to older versions of ubuntu (8.04 which will work with the ATI drivers is just about to lose support, all other versions that have any suport for the 9600 are out of support)
You might be best to add a PPA for the newest free radeon drivers (it can make a difference) and gallium 3D should make gaming a lot better.
Add this to your software sources-
Then update, that should get you the newest free radeon driver.
Last edited by cascade9; 03-31-2011 at 11:05 AM.
Reason: typo, as usual