Entry forms for Round 4 are attached. It's in a couple of weeks time (better late than never).
http://people.aapt.net.au/%7Edselliott/suppregs.pdf
It's at RAC and is a good chance to practice for the Aussie championship, especially since it's at the same location.
Round 4 is only competitive if you're competing in each round as you'd be going for WA Championship position, like me. But everyone else has no excuse not to get out there and find the limits of your car (and your ability) in a relaxed way without the fear that getting it wrong could cost you big time in a championship.