That`s based on the ALi Alladdin V chipset I believe,I would recommend clean install of XP,try it with minimal hardware first to get it stable,few bios tweaks like disable all video shadowing in bios,set AGP 2x ,disable system bios cacheable,also leave PCI slot one empty (nearest to AGP slot),see how stability goes.
You could try flashing the motherboard with the latest bios update and also installing the WinXP ALI AGP driver might be worth trying as well,you can get that from
here I believe 1.83 is latest version.