For the video drivers, the first place to go is the site of the card maker. In your case, it's ATI (AMD actualy):
http://www.amd.com/us/Pages/AMDHomePage.aspx
Under the Find a driver, chose "Desktop graphics", then, in the following boxes, find your model.
Here are some alternative downloads sources that may be interesting:
http://www.omegadrivers.net/ (tweaked and optimised drivers)
http://www.driverheaven.net/ (a store house where you can find all sorts of drivers for just about anything)
You can also do a Google or Yahoo! search for "ati xpress series 200"
Electro, July 2011