It is possible to upgrade existing CS2002 sites to Windows 2003. It is NOT possible to upgrade CS2000 sites, as CS2000 is not supported on Windows 2003. There are several options for doing in place upgrades to Windows 2003, with the process looking like:

  1. Upgrade to CS2002 if not already there - this is an in-place upgrade for CS2000 customers.
  2. Install CS2002 SP3 or FP1. If you do not plan to use the FP1 features, it is probably simpler to just go to SP3. The patch-levels are the same in both packages.
  3. Upgrade the OS from Windows 2000 to Windows 2003.
  4. After the OS upgrade, run the EnableCS2002Settings.vbs file - otherwise many things will break and you will get some annoying error messages.

Voila - it's not that much more complicated than that. And it's a good idea to do so - as well as get your sites on ASP.NET - as CS2006's plan-of-record (based on feedback through this blog and other channels) is now officially to only support Windows 2003+ and ASP.NET site development.