Free (these are all essentially the same instructions, but each has a wealth of comments and user experiences):
• Concurrent Remote Desktop Sessions in Windows XP SP2
• Windows XP Multiuser Remote Desktop
• Enabling Multiple Remote Desktop Sessions in Windows XP Professional and Media Center Edition 2005
• Terminal Server Patch (rather than a tutorial, this is a packaged installer to accomplish basically the same thing)

Fee:
• XP Unlimited turns your Windows System into a full blown Terminal Server, without any limit. Multiple, unlimited number of concurrent remote desktop sessions. Includes integrated web server for access via browser.
• WinConnect Server XP enables a Windows Small Business Server 2003 or Windows XP computer to allow up to 21 remote desktop sessions.

As always, use at your own risk (and joy). Before playing with any of these (particularly in a production environment) you may want to contact Microsoft regarding potential licensing issues.

/windows | Aug 08, 2007