Following the diet for about a month helped me, with adding new foods every few days etc. I am IBS A and mostly get pain as a symptom. When I am good ie eating in a balanced way then I am symptom free.
A lot of the others have said this already but it really does mean watching your own triggers and your own body. I remember feeling good and then having small setbacks that really messed me up and depressed me. Some of us can eat raw onions, other's ie me can't, some (ie me) thrive on wholegrains like wholemeal bread, for others it's an instant attack. Listen to your body, write down what it tells you (ie symptoms) and what you eat and hopefully you will be posting your success story. The diet guidelines on the website are enough to get started with, so start with some of the basics by cutting out caffeine, dairy, red meat etc and work from there.
(if you want to read about my IBS story here's a link to my first year, I hope you find it encouraging)