Recently I got a great deal on to 7 inch monitors and a portable dvd player for my kona. And i need some advice on what exacly i need. I purchased 2 monitors for the headrest, a dvd player, and a fm modulator. Are there any other parts i might need? Also I like take pride at setting it up myself, but i would like to know how much effort goes to this, and if anyone has anyother advice. thanks!