I think you should pay all your traffic tickets, otherwise you'll get difficulties on traffic history. on the other side, outstanding traffic tickets will be the reason for refuse your visa request (if u want to visit aussie again). last but not least, they will keep chasing you to pay your traffic tickets in your own homeland. I have a friend here who got letter from australian embassy to pay all tickets he omitted when he was in aussie few years ago.
woww, Australia really is a biatch when it comes to traffic tickets.. I heard that before from couple of people too. But why CIC asks only Australia applicants or people who lived in Australia in past to provide driving history as well?
Anyways, this world is too small now and technology has made it harder to excape. You should have paid teh tickets. But I am sure if you pay the tickets now and then ask for PCC in few monnths there won't be any issue and you will get you PCC. But the paper might say that you paid them 4-5 years after... but I guess at the end this is the best you can do now. And watch out for all the interest and fines on those tickets as well. May cost you a fortune.