Download ATI's firmware update from their web site.
then,
Download ATI Display from ATI's web site.
I did these on my 7500 (even though it wasn't listed); I'm not 100% sure you'll need the firmware update, but the installer will determine that and let you know. ATI Display will give you the ability to manually override game settings to get the best performance.
EDIT: you need to have the card installed to run the firmware updater, of course.
then,
Download ATI Display from ATI's web site.
I did these on my 7500 (even though it wasn't listed); I'm not 100% sure you'll need the firmware update, but the installer will determine that and let you know. ATI Display will give you the ability to manually override game settings to get the best performance.
EDIT: you need to have the card installed to run the firmware updater, of course.