Usng terminal services

I currently use Terminal Services to run remote Windows 2000 Server sessions for administration.
First let me say, This question has nothing to do with Windows XP Remote Assistance. Thanks

A co-worker has recently told me that you could use a version of terminal server to run remote Windows 2000 Professional sessions (accessing Workstation’s for end users). We have been using VNC for this, but at times this can be choppy and slow and requires alot of coordination with users. Thus this tool falls into the hit and miss category. Has anyone else heard of using Terminal Services to access Remote Windows 2000 Professional Machines? And if so, where do I get some data for this?