I have a cowon q5w mp3 and would like to hook it up to my front unit that comes stock with my tahoe 01. I'm wondering either I should upgrade that unit or just buy a aux port and install it. If I should upgrade, any cheap suggestions or a site that shows me how to install the aux port. My suggestion was replace one of the lighter holders since I have 3 in a column, which I don't smoke so has no use.