Just saw your post and thought I might drop a quick line and suggest going over to the Natural Healing forum (//www.curezone.org/forums/f.asp?f=970) and starting a thread over there. Uniquity is the expert along with a few others and they can really help you out.
I'm dealing with some similar issues (candida/constipation, etc) and have just ordered Intestinal formula 1 and 2 from Uniquity's storefront.
I too was extremely worried about senna dependency but from all that I've read IF#1 does not cause dependency. I guess we'll see! ;)
Also check out Dr. Bernard Jensen 's "A guide to better bowel care" and juice fasting.