aussie car has the imobiliser in the key - loose key, throw computer as well as you cannot rekey it without the original key (great idea that!) key & ecu only $1500 (not kidding)
the odds are ther driveshafts will fit, if not use the donor ae82 ones, they will slip in.
where did you find the info on reprogramming the ecu by the way?
ps these cars also run a very complex body computer - i think you may have issues getting the sequential gearbox bit to work!!