How Can i..

[F8TAL]

Use my LED tail lights as the turning signals?
Do something if at all possible to play movies off my stock navigation while driving?

Please spare me the ridicule im just asking a question.

[BluTorrent]

its possible to make ur tail lights ur blinkers, but to me the work isnt worth it, it would require too many relays, i just went ahead and bought LED's to replace everyfilament bulb in my car, cost me bout $270, but it makes the car 100x cleaner....
and as far as the headunit i have no clue, i hate factory units bein that ive been a pro installer for 5 years lol
my z-130bt is pre-ordered as i type

[ebumdude]

+1....too many relays to accomplish.

If you want dvd function I would suggest going aftermarket or you could possible use a relay on the factory headunit by tricking it into thinking it is parked.