Got your reply last night. Downloaded your video and manual. I even understand it clearly and that's some feat. I found out though that the previous owner has, in all their wisdom, removed the stock amplifier as well. Well done to them, but you have given me a project to get my teeth into. Just another quick question though (I may sound really thick when I ask this) but my satnav, very recently, is requesting the map CD upon opening. I take it this is done through the CD player, therefore, I will have to get the whole system up and running before I can sort this? Apologies for being stupid but I have no literature for the satnav.