Thanks Andrew,
If you do find your wiring diagram, it would be greatly appreciated! As there are 2 ways to wire up and then pre-configure the AFC so it would give me an indication as to which one I require.
As for the head unit setup, am I right to assume ALL stereo changes will require a new A/C controller? I am thinking from a cost perspective, as this is much cheaper at only $145US+Shipping:
http://www.ebay.com/itm/JDM-Double-Din-Conversion-Surround-G35-Brushed-2003-2004-/261131288165?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AG35&hash=item3ccca33e65&vxp=mtr
As opposed to a full kit at almost double the price, $350US+Shipping:
http://www.ebay.com/itm/JDM-INFINITI-NISSAN-SKYLINE-G35-DOUBLE-DIN-DASH-KIT-IN-SILVER-WITH-AC-CONTROL-/251204907913?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AG35&hash=item3a7cfab389&vxp=mtr
Again thank you for helping me clear all this up, I wish the community was much larger here in NZ
Cheers,
Isaac