In with the sat nav then.
So out comes the parcel shelf to plonk the gps antenna into place. Unfortunatley i think i broke one of the latches on the shelf, its glue is drying at the moment so its not so bad. Anyhow the gps antenna sits nicely into a indented bit of the metal shelf under the parcel shelf, but beside the speaker on the right:

and luckily everything is there, even the bracket for the sat nav to fit into place:

it just slips in there and locks into place like a car radio (i think its single din sized) you hear a satisfactory click when its in place.
cut a hole in the carpet and hey presto:

ok the hole isnt right but that can be sorted some time.
It sounds easy but i had to relocate the parking sensor ecu, and the sound supressors i have for the radio, a bit fiddly but all done. Just need the screen now.
It does work, i got the two lights on and was able to eject the cd, should i put it into my computer and make a copy incase it gets scratched?