No, but I have a question about that procedure. XP apparently has its own drivers for most if not all compatible cards. How do you get it to utilize a downloaded driver? Will it look automatically or what? And for some cards, like say a G450, XP has onboard drivers, so are these the same as the ones you download or do they have different features?
For the G450 card the last date for a MSFT certified driver for XP is Nov 21, 2002. The latest driver Matrox has put out for this card is Feb 28th, 2003. You have to axe out the old driver before you install the newest one. I am not running this card so I cannot say for sure which driver would be the one to use. Who knows how recent the drivers are for the Matrox G450 card that comes along with the XP OS. I guess you could look for it on your hard drive and see which driver it is.
Just to finish this off, I ending up trashing the ATI card that came with the dell and putting in a cheapo G450 agp dualhead I got on ebay, plus I put in an ancient matrox millenium pci card that works fine with xp. Booted it up and everything worked fine. I did have several ati pci cards that would not work under xp, plus an old stb dual using an S3 chipset that wouldn't either. Based on my experience upgrading the other computer to xp pro from 2000, I will concur with another poster's suggestion to get at least 512 megs of memory for xp. It will work ok with less but screens won't come up as fast.