Hi! Well, this diet has worked for me, but it only worked when I stopped cheating; I would start feeling better so I'd have some pop or something with dairy in it and that would set me back. Also, a mistake a lot of people make, myself included, is staying on the Breaking the Cycle diet for too long. This is the very bland, SF only diet that you start with, which you're only supposed to do for a few days. Make sure to start incorporating protein and IF or else you'll just feel ill, grumpy, and hungry.
Also, as someone pointed out, this is a lifestyle change (in addition to a diet that regulates your digestive tract, you work on stress management, exercise, etc, to minimize your symptoms). It's also fine to take loperamide/imodium as needed and as a preventive while you're trying to get stable.
Instead of reading through the posts, I would read through the information on the IBS Diet & Recipe section on the main website. A lot of this is the same information you'll find in the books.
Psyllium is a really harsh SFS that will cause gas and bloating, so I would avoid that. Can you get Benefiber (guar gum) in Australia? Try that, or try Heather's Acacia.
I hope the diet works for you. A lot of people with D seem to have had good results. Take care!