I have decrypter and shrink and Imgburn.
Well Canadian DVDs are region 1 and Australian are region 4 (Wikipedia) so you'd need to change the region of your DVD drive.
But you can only change the region a limited number of times. From the same Wikipedia page:
There are other ways around this, but they may well be illegal in certain jurisdictions.
You could also download "anydvd" and run that. It's by the same people who made CloneDVD, CloneCD, etc. It will run in the background as a service, and basically unlocks HD codecs and things of the sort for burning HD movies on non-HD devices. However, it also unlocks the region coding for the DVDs, so you can rip/burn what you want.
I use it right now, because my wife is from Japan, and we only own one dvd player...i have to rip Japanese movies to US format for my Playstation 3 to use...so i run Anydvd, and i can watch any region dvd on my PC dvd player, rip it to a Region 0 or non-region file, and burn that to disk for use in the Playstation 3. Here's the link: