Well, you might find the following information handy:
Article 325379 -
How to Upgrade Windows 2000 Domain Controllers to Windows Server 2003 Support Webcast 812954 -
Microsoft Windows Server 2003: Upgrading Windows 2000 Domains to Windows Server 2003
(Hint: click the PowerPoint presentation, and skip over the slides that you don't need)
Article 555040 -
Common Mistakes When Upgrade Windows 2000 Domain To Windows 2003
From the
Win2003 server deployment kit, download the following book (you'd probably be most interested in
chapter 9):
Designing and Deploying Directory and Security Services Article 331161 -
Hotfixes to Install on Windows 2000 Domain Controllers Before Running Adprep /Forestprep
Good luck!
- rp