I've never heard of this diet. IMO it is not necessary to buy specific products in order to lose weight. Bu that aside, you say that you only want to stay on it for 4 weeks. Do you have a plan in place for what you are going to do after? To me, it was imperative that I had a good plan in place, one that I could use longterm - forever in fact. I knew that that was the only way to keep off the weight permanently. There really are no "qucik fixes". Losing weight and keeping it off is a longterm commitment. I found that simple calorie counting is very effective. I elminated junk foods and those without any nutritional value and ADDED in good wholesome, nutritional ones.
There are many different "diet" plans mentioned here at 3FC. As well as a section of "diet" book reviews. Why not browse around and see if something interests you? Good luck with whatever you decide. And of course, WELCOME to 3FC.