Thanks for the reply.
I got the setup working satisfactorily with CPWizard creating the control panels on the fly, using Hyperspin & a hyperlauch/autohotkey script. It's kinda "hacky" but it's working just like I wanted. Seems that CPwizard wasn't really intended to do this sort of thing but I'm sure if Headcaze tweaked it a bit for this type of use, it would be much easier.
When you select the game in Hyperspin, CPwizard fires and displays the control panel (and when I make a custom layout, the marquee). When I exit, CPwizard closes down and my windows background for the 2nd screen (some space invaders art) shows in the secondary monitor until the next game is selected.
If this hacky setup turns out to be unreliable, I may have to go more the route in the thread you posted. I'll update as I finish the cab up, working on it right now actually.