User was installing XP SP2 on her computer and shut the PC down prior to its completion. It gets BSOD and lots of fatal Exception errors at boot. It will not boot into safe mode either. Is ther something I can do through recovery console to undo what she has done?

The only PC info I have is Win XP Pro. She called the tech that built the machine and he said he'd gladly come out Thursday. This is a non-profit org that can't wait that long so they called there non-profit PC repairman.(Me!!)

Thanks in advance. I've read these forums for years, now I need y'alls help!!