creaking is usually a lubrication problem where metal touches metal. Try putting a drop of oil on the pedal springs and a drop where the cleat connects to the pedal. If that doesn't fix it, next thing I'd do is check your threaded connections and make sure they're greased. cleat-to-shoe, chainring bolts, pedal-to-crank, and crank-to-bb are the big ones, in order of easiness.