Unless they have changed it in the last two years, it is seriously as easy as that. From memory there is some form you fill out, get your principle to sign it and put the school stamp on the box, send it away and your pretty much in. As I said, I don't know of anyone who put in an application and got turned down. Well worth a try.
I moved down to Canberra from Wollongong in Semester 1 last year, lasted a semester and absolutely hated it, so I moved back to Wollongong. I now just group all my tutes into two (max three although I always try for two) days and just stay the night and travel back. It's a massive pain but it beats living in Canberra in my opinion. SO much cheaper as well.
Don't let that turn you off though haha. I speak to other people down there and they like it.