I've just dug my old paperwork out and it is called Mix2Max. It worked for me, I lost 3 stone in 3 months. What the book actually says is:-
"Q. When should I choose Mix2Max?
A. Give it a try when you've really got to grips with Free and Superfree Foods. Then, whenever you like.
Q. How will I lose weight with Mix2Max.
A. Like the Green and Original choices Mix2Max is based on the power of Free foods, which are super-satisfying for the appetite and yet are relatively low in calories. While you are filling up on unlimited amounts of these foods you are naturally limiting your energy intake without counting a single calorie. All Free Foods whether Green or Original have these extra-satisfying qualities. So by making each main course either Green or Original, and snacking on Superfree Foods, you will be cleverly controlling your energy intake while enjoying more choice than ever."
Hope this helps and good luck. I need to get back on it myself.