Add user group to Local Admin group

We are in the process of moving approximately 100 of our 150 users to a different NT domain, including the IT Administrative staff.

Currently, each desktop’s Local Admin group contains our Domain Admins group. But since we are moving to a different domain, we’re trying to figure out an easy way to add the new domain’s admin group to the desktops without travelling to each individual computer.

Is there a tool that can be used to apply this change to Windows 2000 Professional desktops?
Hopefully that all made sense! Thanks in advance,

Michael Carnes
Network Technician
DMJM+HARRIS
michael.carnes@dmjmharris.com