in Dreamweaver select the state list in design view. with the state list selected, click the Dynamic button in the Property inspector.
In the static options section, you can remove any states you dont want to show and replace them with Australian states.
If it is not progressing from the confirm page to the success page, there is probably a php error occurring.
Add the following to line 1 of the confirm page to turn error reporting on:
<?php
error_reporting(E_ALL);
ini_set('display_errors','on');
?>