An update for everyone:
All of the necessary framework modifications are now complete and successful, all thats left is some minor bug squashing and to finish the media screens. Next version will be able to support an infinite number of simultaneous screens and multiple sound cards (requires sound plugins that support multiple instances). Performance tweaks were also made and the net result is increased performance despite the more complex core. On a core 2 duo I had 10 simultaneous screens running without any noticeable performance penalty. Hopefully, this will add a new advantage CarPCs have over the alternatives.