or eMachine Fun, part Deux...or part DUH...

eMachine with new PSU and now new MB...MB has VIA c-set, origonal had Intel. Machine will not boot into windows (safe or normal); after processing drivers in safe mode - it reboots.

Origonal installation is XP Home, and I do not have a disk for it. Put in XP Pro disk to boot into setup - no repair install possible (home vs. Pro), Recovery Console does not recognize Admin password to get into c:\windows. User doesn't know of a password for Admin Account...

Have not been able to load MB drivers yet because of boot problems.

Any ideas short of NUKE (either by recovery cds or manual)???