Initially I didnt have much to offer except "Are you bill gates, having trouble @ CES demostration?"

Seriously now... Do you recall what the other stop codes were or were they all concerning PCI.SYS ?? If its all PCI.SYS, then there must be a conflict with the PCI chipset driver and one of the drivers for a PCI device, such as Modem, LAN, Soundcard, Firewire, USB, or SATA/IDE raid card... do you have any of these installed?? Try removing all hardware except on-board stuff and HD, then try re-formatting and installing windows...

The fact u are using old windows XP in a PCI-e board may cause a problem... can you try and get a proper version of XP??

Also, when you get XP to install, you should install SP2, and also the motherboard chipset drivers and utilities.. they update a lot of low-level hardware drivers