HelosRfun,
I'm in the middle of converting my FAA commercial to Aussie commerical. I've done the written test on air law which is open book. It's a little more difficult than FAA written as you have to find all the relevant info in 4 or 5 publications as opposed to being well up on your FAR/AIM. Shouldn't be a real problem though as I managed to pass!
As for the flying part, I haven't done it yet but understand that it is similar to an FAA commercial checkride, so also not too bad. The medical is a little more stringent than US class 2, ecg, blood test (for cholesterol) etc. is required, but I passed that too.
Good luck, and yes, Aus is a good place to live <img src="wink.gif" border="0"> <img src="smile.gif" border="0"> <img src="cool.gif" border="0">