hey mate i have done the conversion before, obvious parts are tha man gbox clutch pedal master and slave cylinders, u may need a driveshaft im not sure in the gts4 if auto to manual are different and u may need a manual crossmember once again not so sure, as for the electrical side of things i found the easiest way was to take the selector of the gbox and hide it in the engine bay as it is useful as a theft deterant by switching it to a gear the car wont start, switch it to neutral the car will start so its up to what u think will be easier. there is a few forums on here as regards to reverse lights i no it involves running a couple of wires nothing to major, anythn else you want to no???