OK, in my old car which is an 86 acura legend I had my new stereo a sony drive- s model CDX-GT200 in stalled. but now I have a new car, a 2000 ford focus which has its own stereo but a much older one, a kenwood KDC-215S. I really want to put the sony model in my focus, but how do I do it? what kind of kit should I get? I'd much rather do this myself than pay a hundred bucks to have someone do it for me. Any helpful info can really help thanks!