Finally got the whole damn thing to work!! It is nothing too big just something that sounds really nice with a little bump in the trunk. For a head unit I went with the Pioneer Super Tuner III D (50w x 4), to replae the factory speaker I went with Pioneer 3 in. speakers in all four corners and a Pioneer 240w amp. running a Jensen 8 in. Subwoofer in the trunk. The sub rolled around in my trunk for a few months so after I got it installed and turned on it had a like rattle, so I broke it open a resealed it with FIPG (Toyota's version of gasket maker.) and used some heavy duty screws and now it hits twice as hard as it did before. I guess thats because its seal better than it was at first. I had to use a wire adapter, that I got from Advance Auto, to get the head unit to work properly and suprisingly the factory radio brackets worked and I got to keep my cup holder. I spliced into the rear speakers for a sound signal to the sub and mounted the amp on the backside of the back seat with some industrail strength velcro to to keep it out of the way of my tool box. The only thing that need to figure out is how the mount the sub so it says in place. (Any suggestions would be great.) Like I said it is not to flashy but is sounds damn good and it didn't cost very much very much either!!