Follow the link provided for detailed instructions on enabling XP GPO
settings on a 2000 domain. The link also describes how 2000 workstation will
handle the GPO's which it can not understand.
307900 Upgrading Windows 2000 Group Policy for Windows XP http://support.microsoft.com/?id=307900
Hope this helps
Rick Sears, CompTIA: A+, Network+, Server+, Security+ Microsoft: MCSA, MCSE