@OP
did you get your other driver installed too?
take this time to take the driver you found for your video and make a backup of it on a cd and label it.
(I'd tell you to slipstream it to your install disk along with sp3 (if you don't have) other updates and all drivers, but unless you've done it before it may be overwhelming)
hell why not, program called nlite that I've used a few times to package drivers with cds (comes in real handy for downgrading vista systems to xp as the hdd controller drivers for sata aren't pre-supported on xp...)
edit: link
http://www.nliteos.com/
(you could use driver packs to slip to your disk but just for a single system I would find it to be cumbersome)