W2K Crashed - Need to access or reactivate old user accounts

Hi guys and gals!

I had a minor crash in a very stable system recently (is any crash minor??). When W2K boots up it gets past the bios and on the blackscreen the progress bar gets about 10% done and comes up with an error message that a file in SYSTEM is corrupt or missing. I have tried the recovery console but the installation is not found. I STUPIDLY did not make a a recovery disk when I upgraded to SP4. I did do a parallel install to another directory (WINNT2) and able to reboot my system (using it now!). The user accounts are displayed when I do directory search through 'c:\Documents and Settings" and they're all there but I don't know how to reactivate/backup/restore/whatever them to be able to use them again. They are not displayed in 'Computer Management' either.

Can I save myself here with your help?