Recovering Domain from non-booting PDC

Durring and update to my Primary Domain Controller (win 2000 advanced server) something has it cought in a blue screen reboot loop. This I may not concerned about, however is there a way to recover my domain information and usernames/passwords so I can simply format over the boot partition and rebuild the server? I can get the server to boot into directory restore mode, but restoring system state (ntbackup) simply puts it back into the same loop. The last thing I want to do is have to rejoin 30 computers to a new domain when I rebuild the server. Definite steps would be much appreciated.