So exactly when is your colonoscopy? I mean it IS the weekend still, no? From what I recall it was a one night deal...the stuff they used to use I fondly nick-named "Colon-Blow" (do I need to sue the Dumb and Dumber producers?)...In some ways, the prep is worse than the test itself!
MAKE SURE that you take any sedation pain-relief they offer, ususally it's a demerol/ativan cocktail IV. NICE!
The prep is MUCH worse for the colonoscopy!!! I LOVED the drugs, though. It was almost worth getting the procedure done just for them...