I studied for it in 2 weeks after my BAK exam, the test is easy... just go through a chapter at a time of the book, write a short summary, then at the end review it all and go through about 4 practice tests from different sources.
Dont retype it like a robot though, put summary's in short own words and yeah.
Thats what I did and got 87%
Not sure if the test is very different but yeah im in AUS btw.