Thanks for the detailed response mate - much appreciated . Agree the G4 is much 'cleaner' than the usual custom options.

Interesting about the info on the resistive lead for volume control on the G4 (could save some $$$ for others like me planning on doing similar!) - didn't know that was available given the G4 info on the web. I think I saw a wiring diagram for the Euro's OEM system somewhere on this forum... So short of buying a workshop manual, I'd be interested to see if you actually ended up using the Car2PC interface...

Regarding the extra screen - I'm now planning to use the area above the centre air vents for an extra screen - I didn't know there was space until one4spl included the pics (thanks!). Wonder if anybody has experience in this area and know of any kits? Ahhh, something to fill in the time at work tomorrow...

Now I just need to convince the missus that this is what the baby bonus should be used on... my kids will love watching Wiggles in the car in a couple of years... surely yeah? hahaha

Thanks for keeping us posted - looking forward to your end results and any other advice!