yep I'm doing it too.
You basically got to register your interest (online) at the UNSW med site
http://med.unsw.edu.au
and after that, download the application/CV.
with that you gotta answer some basic kind of questions.
ie. what are your hobbies?
other languages?
voluntary and involuntary work?
what qualities do you think doctors should possess?
etc etc
after that, you need an academic referrer ie. your principal to predict your UAI and write some additional stuff on you. probably about school involvement..
that's due july 25
and what's due next friday ie. june 13
is the actual fee to take the exam.
you get that from
http://www.acer.edu.au and follow the UMAT links. It's $120. you can pay online with a credit card or whatever.
late fee of $50.
hope that helped you
ARGHH how scary
you can also get sample questions.