I cannot repair (using the OEM XP disc) or reinstall XP following a system crash. Neither can I get to safe mode, last known good etc - I keep getting the dreaded BSOD with an error "PAGE FAULT IN NON-PAGED AREA". I haven't installed any new software or hardware recently. PC is Compaq 2504 notebook with 512MB extra RAM which I've tried removing but with same result.
what happened when you tried reinstalling from cd, but I'm assuming that it ignored the disc. can you not boot at all from the cd? if nothing happens try getting into bios and resetting boot sequence to cd as first boot device.
did you get some form of system restore disc with the computer? (be aware though that you will loose al the data on the machine as it returns it to factory condition, assuming no hardware fault)
(scraping the barrel a bit here) if you have or can borrow a windows 98 cd (or and dos bootable cd) and can get to a dos prompt then run a scandisc on the hdd. I cant remember off the top of my head the path on a 98 cd for scandisc but if its a problem then I can (or someone else probably would) dig out the path for you if you do this.