wire it to the cigarette lighter?:S why?
i got the keys u need to take old one out pulled it out and unclipped the cables behind it ( very tight but long nose pliers did the trick)
put the cage into the dash, then
plug in the ISO adapter to the wires in the car ( note you should have one or two cables left over, one for the dash display and one for steering wheel controls, so they should be left over unless you have the steering wheel control leads) then the other side into the head unit. plug the radio adapter plug into the head unit aswel,
slide the head unit into the cage ( wires may have to pushed upwards to make room) then once head unit is in place fascia over the head unit.
Hey presto your done!
il post pics tomorrow if u need them?