Admin rights over new pcs to domain

We are upgrading our network software from novell to window 2003 server. With the old system, we had to define ourselves as administrators of the local workstation which runs on windows 2000. Now when we join the workstations to the domain, we find that we still have to define as administrators on the local workstation even though we belong to the administrators group in the windows domain. Surely there must be some script that we can add to the log on script that automatically gives us admin rights over the workstations in the domain?