To Rename a Primary Domain Controller
On Windows NT 3.x computers, from the console of the PDC, go to Control Panel Network.
On Windows NT 4.0 computers, from the console of the PDC, go to Control Panel Network and click the Identification tab.
In the Network Settings dialog box, choose the Change button next to the computer name. Type the new name in the Computer Name dialog box and choose OK.
Restart the PDC for the name change to take effect.
In Server Manager, if the old name still appears as a Backup, or if there is no entry for the new name:
Create an entry for the new name. To do this, select Add to Domain in the Computer menu of Server Manager.
Add the new computer account as a "Windows NT Backup Domain Controller" (it will be added and displayed as a Primary).
Remove the old name by selecting the entry. To do this, select Remove from Domain on the Computer menu.
NOTE: In some cases, the steps above may create two accounts for the new computer name: one as a backup and the other as a primary. If this occurs, remove the Backup as described above.
Hope this helps you man, this is straight from microsoft on how to accomplish this.
Ryan
