My diet is probably similar to Ornish but I add on a lot of supplementation from protein powders (soy, pea, whey, etc.) and fiber supplements (psyllium, acacia fiber, glucomannan, etc.). Be careful with fiber supplements. Some people may not be able to take as much as I do because their insides might gum up. People who have had GI surgery generally can't do a lot of psyllium at once.
Some of the key points are: take fiber supplements frequently to fill yourself up (and provide other healthy benefits), drink lots of water, and stick to a low caloric density (lots of fruits and vegetables).
Activated charcoal and bentonite clay can be used after overeating.
One of your goals is to make your stool float (sounds gross, but if this is happening, you are there).