well I have recently purchased a V35 from melb. The procedure was... purchase the car, bring it back to adelaide, go to regency ID inspection centre (no need to book) and then fill out a simple form and wait to be assessed. This examination is not as strict as defect, but try to keep your car stock as possible. My v35 was stock, but they failed me for having tints. However I was able to pull out my tint in the car park and was passed shortly.
Once your car has passed, the inspector will allocate you with a form. This form is then taken to the actual regency department and you can purchase your rego.
For insurance, you may want to seek for a quote prior to purchase. I am with Justcars.
gl
beepee