Yea, with 03 you'll have to install the extensions that allow powershell to work. It's essentially just VB script that you can use on Server OS's to accomplish tasks like the one you outlined above. Give me a minute and i'll repost what i find. I know the script to import / export on 08, i want to make sure it's the same for 00 and 03.
So...:
This article describes the installation packages for the English-language versions of Windows PowerShell 1.0. The installation packages are designed for the following versions of Microsoft Windows:
Windows Server 2003 R2
Windows Server 2003 with Service Pack 2 (SP2)
Windows XP with Service Pack 3 (SP3)
I don't think powershell works with 2000. Do you have an option to upgrade the server to 03? Even if it was on a trial basis if you are decomissioning the server you could upgrade, export the accounts then trash the server.