NT server to NT BDC

Unfortunately, you will have to reinstall if you want the member server to become a BDC, and it will have to be a fresh install.

nope. you can promote a bdc to a pdc or visa versa... however, you can upgrade the member server and THEN change to a BDC.. I think 2000 will let you do that.. Here's the article on that one...

http://www.microsoft.com/ntserver/nts/deployment/migration/nt4tont5/1_Introduction.asp

Hope that helps..

While there is no way to promote a Member Server to a BDC, there are short cuts, check lists to making a fresh install.
a) Use Setup Manger from the resource Kit to make an answer file. e.g. Unattend.txt
Then when you install its winnt32 /u:a:unattend.txt if the file is on a floppy.
b) Plan your installation. How big a c:\ do you need? Where will the WINNT be D: e:c) Finally consider a dual boot on your present machine. The reason if the BDC crashes you can reboot to the Member server and restore from backup, its the fastest way to repair NT.