Recieved the Head unit yesterday. Fitting was quite easy despite my complete lack of skill. I struggled to fit the jungle of wires back into the slot, i ended up removing the glove box below the passenger airbag and pulling it all through from behind. Now i just have to wait for the skin on my knuckles to grow back

I managed to create an MP3 disc in the end, using windows media player and Nero, easy when you know how!!
And despite Dizzie's emphatic answer re sony cd changers, i tried it anyway and he is right. Of course!
The head unit is an Alpine CDA-9831 and i'm dead pleased with it and would recommend it fully.