NT to 2003 Upgrade

I'm planning on doing a NT to 2003 upgrade but I want to test it first.  So, I was going to create a new NT4 BDC and replicate it with the PDC.  Then remove the new BDC from the live production enviroment so its effectivley in a test lab and test the 2003 upgrade process.

My question is when I remove my new BDC from the production enviroment how do I force it to be a PDC ?

I dont want to modify the live enviroment at this stage.

So, my goal is to have my live enviroment safe with a PDC and a BDC and my test lab with a BDC thats promoted to a PDC so I can run the 2003 upgrade as a test.
MarionTaylorAsked:
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oBdACommented:
For a test environment, you're probably best of with Virtual Server (free now). Backups and restores are reduced to copying "harddisk" files and/or using undo disks.
Microsoft Virtual Server 2005 R2
http://www.microsoft.com/windowsserversystem/virtualserver/default.mspx

The promotion itself is done in Server Manager; highlight the BDC, and choose "Promote to Primary Domain Controller".
And some links that might help for the upgrade:

How to prevent overloading on the first domain controller during domain upgrade
http://support.microsoft.com/?kbid=298713

How To View and Transfer FSMO Roles in Windows Server 2003
http://support.microsoft.com/?kbid=324801

DNS is even more important for AD than WINS is for an NT4 domain:
Frequently Asked Questions About Windows 2000 DNS and Windows Server 2003 DNS
http://support.microsoft.com/?kbid=291382

Best practices for DNS client settings in Windows 2000 Server and in Windows Server 2003
http://support.microsoft.com/?kbid=825036

And some general links:
Tools and Documentation for Upgrading to Windows Server 2003
http://www.microsoft.com/windowsserver2003/upgrading/nt4/tooldocs/default.mspx

Background Information for Upgrading to Windows Server 2003 Active Directory
http://www.microsoft.com/resources/documentation/windowsserv/2003/all/deployguide/en-us/dssbe_upnt_huxa.asp

Migrating Windows NT Server 4.0 Domains to Windows Server 2003 Active Directory
http://www.microsoft.com/windowsserver2003/evaluation/whyupgrade/nt4/nt4domtoad.mspx

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MarionTaylorAuthor Commented:
Thanks oBda I'll get reading.

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Windows Server 2003

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