Hi, has anybody installed rear electric windows into an AUIII sedan?

how different would it be to the tech doco here for EF/EL??

does anybody have any ideas or tips etc??

Well, the principle is the same.
EF/EL Futura's are the best to convert, as the rear door wiring goes up to the bulkhead near the hinges, so just add the door wiring - funnily enough, XR's are like GLI's, there is no wiring at all to the rears.

I don't know if the AU's follow this convention or not - I'm pretty sure someone has asked about this before (maybe it was the BA's) - and IIRC, the wiring was absent (don't remember the option level of the car).