Thanks everyone for the input I am working through the suggestions.
PNP is showing "manual" or "auto" only and is set to manual - giving a list of IRQ's which are listed 1 upwards. The hardware set-up is as basic as it gets, with only the onboard hardware now configured - I've removed the modem and put the ram back to how it was before the problems - with no improvement.
PNP manual or auto eh? Try auto.. never saw those options before.
I was setting up my XP and with 7 minutes left to finish installing XP.. when it says "Saving configuration" or something to that effect, it'd lock up and/or reboot.
The problem was I was running in Dual Channel with my memory.. but one of my dimms wasn't up to par, which was causing the problem.
Try running on 1 dimm when doing the install.
Basically, you're working off the CD and Hard drive at this point. It's definately something harware related in that it's rebooting. If it's consistent with 13 minutes left, chances are your CPU is not over heating.
I'd run on one memory module, if it fails, try the other one.