Set-Up Windows 7 Pro Host for Multi Monitor RDP / MSTSC
This was connecting FROM a windows XP SP3 Laptop TO a Windows 7 Pro Desktop.
I was using an additional monitor n the lap top.
The main break through is using RDP Wrap, and piece of software that does something to allow use of multi monitor support on WIndows 7 Pro.
Just download this and intall this on client computer.
RDPInst.exe and then Install.bat.
Then make sure you have rdp 7 or above on your XP machine, and check the box that says "use all my monitors in the display tab of the RDP program.
Microsoft have removed the patch for upgrading XP, so here is is here.