New
#11
Thanks for your help Mellon Head. I actually managed to install the driver by manually selecting it from the device manager's update driver option. It took several tries, since just selecting the folder wouldn't work (Windows wouldn't find a more appropriate driver than the already installed "Standard VGA Graphics") and I ended up pointing to the "inf" driver file for Windows Vista.
Bottom line, the system now recognizes the card and I've successfully run a couple of programs that with the Standard VGA Graphics either didn't work or ran poorly. I also executed the Unigine video benchmark tool with rather poor results (10FPS on low graphics), but since it's a pretty demanding benchmark I'm not too upset. I suppose I could possibly get a better performance from the ATI, but at least it seems to be working!
Once again, thanks for everything!