Tell us more about the HTC flyer! How do you like it so far? Do you have the pen? How is the GPS? What about Bluetooth? Have you rooted it?
How do you like HTC's flyer skin for in car use? Better/worse than stock android?
I think the app you referred to is tasker, to auto turn off the display? You can also set it to toggle pause/play (I can't get this to work for you tube videos/slideshows though, haven't tested also with other video players).
Thanks for the pictures. Add more about the charging setup if you can.