I just went through process on my Comsec account. I needed to register for International trading first. 5 processing days. When pricessed they send me a W-8 form...US tax form. Then transfer shares using the Comsec ACAT.pdf form. Hope this helps.
Week 44 Wrap: Relatively boring week ahead of US election; HotCopper's most watched; Oz inflation at 3.5%