Hi TCJ.
I'm in the same boat as you are, as I saw it would run on XP so I bought a copy. I'm running a 32 bit version of Windows XP, 4GB RAM, Intel Duo 2.4 ghz processor, and the GeForce 9800 GT 1GB card.
It works... but... when I try to go to the first town, it crashes to the desktop during the transition. I haven't looked to see if there's a fix for this, as I've just started playing today. I haven't seen one just skimming the boards yet.
If anyone knows of such a fix, I'd appreciate it. (And no, I can't buy a new system either as money is an issue too.)
--Corgano