Don't worry, we get asked these kinds of questions all the time. :)
Dr Schulze #1 is the laxative part wtih cascarda and I think senna too, it's the #2 that both cleanses and exercises you bowels and has all the fiber in it and such. :)
If you need a laxative for longer than 10 days, best to use a fruit-based laxative like Triphala, which actually strengthens the bowels.
A colonic is almost like an enema, but most of them must be done with the help of a professional technician utilizing a special machine to increase the water pressure, and a special hose that allows you to take in water and release as necessary.