Yes! Raw foods are great - they have the enzymes needed for digestion built into them. If you eat some cooked food, I recommend using a good enzyme supplement. I've had good results with constipation and enzymes.
Have you looked into Dr. Schulze 's bowel cleanse? It uses some herbal laxatives to get things started. I've used these in the past with cleanses, maybe I didn't cleanse long enough, but I wasn't able to maintain the regularily once off of the products. With just enzymes, I don't need anything else.