Car audio question.

I am in the process of biuilding up a system of my own, its about 2/3 done and heres what ive learned so far relative to what you need. First off, what is it about your deck that prevents you from changing it out? In any case, for the audiocontrol three all you need is one of those cheap FM modulators(about $10 at walmart) or while youre at that walmart, stop by the cd changers. They got a 10 disc mp3/cd changer thats cd/rw compatible for about $110. Its not the best but i have one and no complaints so far. Hope this helps and any questions msg me on AIM, my S/N is alienautopsy1951