Having just received my Rio Car Player (40 Meg) I rushed down to the local stereo shop for installation. Being in the the most isolated state, they had never seen such a unit and had no idea how to install the player in my Expedition. They recommended completely removing the stock Mach stereo system, CD Changer etc. Before I agree to anything that drastic, I wanted to see if anyone has installed a player in an expedition or similar Ford before? Any help?