I found out I can't rename it. So here's a thought: Would this be the easiest way to do this? Demote the server 2000 DC to a member server, have it join the NT4 domain, upgrade the BDC to 2000 and leave the PDC NT4, promote the 2000 DC member server to DC, wait 15 minutes for replication or force it, then demote the "NT4 BDC/2000 DC" back to a member server and then remove it? Correct?