Region 1 DVD playable in Australia?

Oh, no, you can't directly play a region 1 US DVD on region 4 Australian DVD player, but you can use a right software to burn a region free dvd from your region 1 US DVD, then you can play the region free DVD on any country's dvd player, you could follow me to use RZ DVD Copy, it can remove region code limit and copy region limit DVD to a new region free DVD, such as burn a region free dvd from your region 1 US DVD, then you can play the region free dvd on your region 4 Australia DVD player, you could search and download RZ DVD Copy through yahoo or google, hope it could help you.