car stereo converter What method should I use to connect my MP3 player to car stereo? I have a 2007 Ford Focus and a SanDisk MP3 player. In my view, I have two options: an FM modulator and an auxiliary input converter (http://www.logjamelectronics.com/piefrd04aux.html). The converter input probably cost about $ 100 after shipping, but it's [...]