What exactingly do you me by redo everything? How much live stock do you have?
Browse through the "All SPS Tanks" sticky in the SPS forum to get an idea of how you want to do your rock and go to town.
Use Rubbermaid tubs to put your rock in, avoid disturbing the sand as much as possible, and avoid squishing anyone in the tank and redue your rock. If need be you can do a water change. You won't crash your tank just by moving the rock around as long as the rock is relatively moist it can be out of the water for an hour or so with no problems.
-Brett