Rita,
I don't want to sound anti open source, but you do understand that the Microsoft RDP client will run on ANY 9x, NT, 2000, XP box? And it also only takes a matter of minutes to setup. Also if your attaching to a Windows 2000 Terminal Server and workstations are Win2k, then you don't need a terminal license at all.
Sometimes a speedy, low impact solution is better than radical change.
Just FYI
Micah F. Hale
Ingleside ISD Technology Dept.
micahfhale inglesideisd org