Windows Terminal Server Edition (for NT 4.0 or Windows 2000) is a multi-user server operating system that provides the ability to host multiple simultaneous thin-client sessions. All client processing is performed centrally at the Terminal Serverand only display, keystroke, and mouse commands are transmitted over the network to the client terminal device. Terminal Server provides remote users access to 16 or 32-bit Windows based applications from client terminals or computer systems. The client terminal or system can either be a Windows based terminal or a personal computer running Windows 95, Windows 98, Windows NT 3.51, or Windows NT 4.0.
Citrix MetaFrame is a Windows Terminal Server add-on that significantly enhances the functionality, manageability, and ease of deployment of Terminal Server solutions. MetaFrame is essentially an add-on to Terminal Server extending its functionality beyond that of the RDP protocol (Remote Desktop Protocol (RDP) is Microsoft's proprietary communications protocol
It may be worth looking at.
http://arconline.esri.com/arconline/whitepapers/ao_/wts_support.htm?PID=1
(REMOVE SPACES from the pasted URL.)
Maxwell