For fans of FSX checkout the FTX series of addon scenery and airports for Australia:
http://www.ftxnow.com/
In particular the Gallery to see how it looks, and there also some vids on the main home page.
It is truly spectacular to see what they have done with FSX. I have all regions of Aust myself and its just fantastic.
You can actually download a demo of FTX which is the whole of Tassie. If you've got FSX and are sick of the crappy looking default scenery download it and give it a go. Also grab the freeware Launceston airport too while your there. Both demo and freebies available on the Free Downloads section. This might sound like a paid advertisement but I honestly have nothing to do with ORBX other than being a happy customer!
There is also another group OzX that cater for the GA enthusiast with hundreds of add-on aerodromes and strips all over the country.
http://www.aussiex.org/