What type of head unit are you running? I have auxilliary inputs in the back of mine, several RCA's, and my old head unit had hookups for a sound field processor, should you want to hook up a DVD, or a TV monitor. . I know sony makes an aux input, as I have one to install in a friend's Freightliner Western Hauler conversion when he gets back off the road from Rodeos... He has a TV, and now one in the top console, but no way to run them through the stereo. I am going to make it so when he hits the source button on the head unit, it will have the AUX input, for watching TV, also allowing you to hear it throughout the whole truck. . let me know what type of head unit you have, as stock ones, there is not much hope for. A good head unit will cost a little more, but it is worth it in the long run... Please keep this in mind, and dont take shortcuts. You will only hurt yourself in the long run! Like I said, if needed, PM me, or reply back on here should you need any assistance.
-Chris-