i've done it on the symphony head unit, and its very easy if you have even a little technical sense.
there are no aux inputs built into the head units, so you'll need a aux input adapter. (blitzsafe, etc). this will take the place of the CD changer plug on the back of your head unit (no more CD changer).
there are no aux inputs built into the head units, so you'll need a aux input adapter. (blitzsafe, etc). this will take the place of the CD changer plug on the back of your head unit (no more CD changer).