Sorry totally missed your other post sorry! In a nut shell Red days are for non vegitatians and green days are for vegitarians. Depending on the day there is a list of free foods which you can have unlimited amounts of (yes really!) and then there is healthy extras which are foods that have good nutrients in them, but when eaten in excess cause weight gain; milk, cheese, bread, cereal etc. Then anything doesn't fit into these catagories is "synned" to which you can have a certain amount of.
My best advice would be that if you think SW was for you then prehaps go to a group to get all the books and have it properly explained to you, then you don't have to go back and you can do it at home.