Hey Skids Check out
Civil Aviation Safety Authority - Home for the rules. Under the Operations tab there is Individuals which has the information you need. Looks like you need to pass a flight rules/air law written exam and a flight test with an examiner to get an Australian PPL issued on the back of your JAA PPL. If you've got an ARN you can apply to a DAME (Designated Aviation Medical Examiner) for a class 2 medical certificate. If you can pee straight enough to hit the sample bottle you should be OK to pass. Addresses for DAMEs are on the CASA website. You will also need to apply for an AVID or ASIC security check to satisfy the anti-terrorist lobby. The flight school you use should have the forms for this, or you can check the CASA website. There is no equivalent to the IMC rating in Australia but you might want to check out a PIFR (Private IFR rating) if you don't want to avoid the clouds. If you're round Adelaide why not go down to Parafield Airport and see who's offering what in the training/hire department. You will probably be required to train as required to meet the test standards. As a visiting, albeit Australian trained pilot I rented a C172 from Forsyth Aviation at Parafield without any problems. Good luck, flying in Australia is well worth it! Cheers VFR