sean was onto the right idea, except for the wireless part...i wouldnt
get a wireless transmitter....that is always a bad idea. seein as how
most places all the stations are taken and you will be competing for
that station...anyways, an fm modulator would work. they connect
directly to ur antenna and then to ur deck. When turned on, it will
cut the signal to a couple of frequencies, allowing you to input ur
audio and play them through your deck, like a regular radio station,
just w/o competing for the frequency. here's an example:
http://www.crutchfield.com/cgi-bin/P...fm+modulat or
but look around on ebay. im sure you can find a better one for cheaper.