Cheers haibane, for the info anyway. I had noticed alot of you guys have factory amps and HK systems - unfortunately the penny didn't drop.
This prob means your looms are distinctly different too. I thought I'd try an easy test and disconnect the 10 pin plug for the CD. No such luck, the CD is still detected and appears to play discs - just no sound. I've also lost audio from the phone kit.
This is good, I think, beacause at least I know this part of the loom does something. I'll have to open up the back and check the changer.