I haven't moved to Win7 quite yet so this is a good question.
I know Win7 Pro http://windows.microsoft.com/en-us/windows7/install-and-use-windows-xp-mode-in-windows-7 (and 8 with some additional work http://lifehacker.com/5965889/how-to-run-windows-xp-for-free-in-windows-8/all) have the ability to run XP inside a window under the new operating systems.
Here is a guide if you don't have the Pro edition: http://www.theregister.co.uk/2014/04/10/how_to_run_xp_on_new_windows/
It should get QuickPar running, but I've never this.