I'm not sure I fully understand what you are trying to achieve.
Can you not use something like showmypc.com or teamviewer.com?
I want to be able to have full control over the second pc from my main pc. But i don't want it to log me out of the main pc like remote desktop does.
Remote assistance leaves everything alone except it allows the user, me, the go in and control everything and see what ever is displayed on that computer.
And i think team viewer will work out perfectly