Necessity of drivers?

I want to upgrade to the 64-bit version of Windows XP, just to try it out, but my video card is a Radeon 9700 stuck onto the motherboard of my laptop, and ATI's website does not have 64-bit drivers for the 9000 series notebook cards on their website.

Now, I know this is probably a very stupid question, but I know absolutely nothing about drivers so just bear with me. I use the program PowerStrip to force a custom resolution on the extension monitor that I plug my laptop into. Even though I don't use the program for much, I can tell that it has a LOT of features. One of the handy tips at start-up that it gave me described how the program talks directly to graphics hardware, so that it can get cool features out of video cards that even the manufacturer no longer supports.

I know it's a long shot, but does this mean that it would be possible to use PowerStrip to get good resolution, multiple monitor support, etc. after installing WinXP64, even considering that drivers don't exist for my video card?