Advice needed on PB shake regimen

I am in the beginning phases of a cleanse using the PB shake method, and I had a couple of questions that I hope some of you "experts" could help me with...

1. I know a "clean" diet of fruits and vegetables along with vegetable/fruit juices is required (staying away from meat, dairy, sugar, etc), but am I allowed to eat whole grain bread, brown rice, and whole grain cereals while cleansing? What about sweet potatoes? Will these items break the cleanse cycle?
2. I am using the Great Plains liquid Bentonite with a fiber blend from Yerba Prima called Daily Fiber Formula. It is primarily psyllium seed husk fiber, but also contains soy fiber, oat bran, acacia gum, and apple pectin extract. Will this work as well as plain psyllium husk/powder for the cleansing shakes?
3. How many BMs should I be having a day?
4. Any other tips to help get all the bad stuff out? I am drinking lots of water, and taking an herbal supplement at night that contains cascara sagrada and several other herbs to help "keep things moving"...

Any words of wisdom, do's and don'ts, etc are much appreciated - I am a novice!
Thanks so much!