Just got an 05 Xterra SE w/the RF 6CD changer. Does anyone know if it's possible to add an aux input to the head unit? I know there's a place in the back to add the factory satellite radio, but is it possible to somehow adapt that into an aux input? I'd like to be able to plug my iPod in via a mini-plug, as opposed to FM modulation. I also want to keep my steering wheel controls, so a new headunit isn't really what I want.