I found this while searching around for seamless remote desktop solutions for Ubuntu to Windows XP.  I’ve just lived with the Windows XP one concurrent user limit for years, it never occurred to me to search for a solution to free myself from such a limitation.  It’s not likely that most users or even power users would find a need for this but when you want to run more than one windows application on a native windows environment while using Linux and you only have a Windows XP/Vista/7 box at your disposal then this patch comes in handy!

Terminal Server Patch at sala source.