How do guys
I didnt use an agent, and found the whole process quite straight forward. There was the odd confused moment, but nothing too bad
I used a company called liveinaustralia.com, who for a fee ($400 i think) provided me with all the required forms and allowed me to ask up to 3 questions per day by e-mail.
I found the service great, and they kept me upto date with any changes....
It saved me a lot of money too
Hope this helps:p