Hmm...I went through and got this as the driver set:
AMD GAME! Drivers and Utilities
I did that starting here:
Drivers & Software and selecting Vista x64, Radeon, X1600.
But, that said, I'm not sure it'll work. You may be stuck with the FireGL drivers:
ATI FireGL™ Unified Driver Version 8.44 for Windows Vista (64 bit)
While the V5200 is based on the X1600, you may not be able to do the same things. For example in the world of aircraft, an RC-135 is based on the Boeing 707. Unfortunately, you can't put a 180 people in an RC-135, because they changed what it was designed to do. So, if you take a FireGL (which is designed for graphic design), you may not be able to do the gaming that the X1600 was designed to do.