You don`t need to install them in XP since it does have native VIA drivers,btw I installed the VIA 4 in 1 drivers in my WinXP, it updates the inf files,I also installed the latest VIA AGP 4.10B driver and USB 1.10 filter driver,I only do because I like to have the latest drivers.
I`ve had no problems with my VIA drivers so far 🙂.