Okay, so I did find a solution... Not the BEST in my opinion, but it works.

I have all 5 sessions load via maximizer (sorry, it's just WAY prettier than having the window frames around each window) and then use the Vista TaskManager to set the CPU affinity manually. (I didn't even know you could do that.) THEN I start KeyClone...

Works great. I dedicate 2 cores to the main session and 1/2 a core to the alternates... I finally had a chance to get it all working and I get very usable performance. 50+ FPS on the main and I have all the alts locked to 15 FPS. CPU meters show cycles to spare, so I may tweak it a bit more as well...

Now of course I need to figure out what I'm DOING in the game.

Thanks so far for all the help!