Normally, Windows XP allows only a single remote login via RDP (which in turn logs out the current local user). However, there are several methods to circumvent this restriction:
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)
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). Contact Microsoft for help navigating their licensing terms.
/windows | Aug 08, 2007