One question....why are you making a frontend? Do the others not do what you need?
And....does this one do something those do not?

My specific need that wasn't covered, was that I needed to have 2 separate displays and 2 separate audio outputs. I wanted the front display and sound tied together, and the rear display and sound tied together. That way, I could listen to my tunes, while the kids in the back seat could listen to thier own tunes, or watch a video.