Don't use the brakes going down hill. My father once decend down a 40 degree ramp(carpark ramp) and his feet wasn't even slightly tapping the brakes. He lets the engine do the job fully. The car was at a constant speed going down and no brakes were applied. He just puts his foot on the brake in case of an emergency.

You can go to Genting with this I believe. My family made a trip to Frasers hill(close enough to genting? Forgot already.    ), no probs going down or up the one way hill road.