Ah, that's OK.
I was telling my wife tonight that there isn't really any reason to stick to buying Region 4 DVDs anymore. Our Sony Blu-Ray player plays Region-free DVDs (yes, I know the RGB DVDS are Region 0) and 80% of the Blu-Ray disks produced overseas nowadays are Region free as well.
So, I'm going to import more stuff from overseas if it's not available from Australia - next up Ghostbusters Blu-Ray!