Bunny Hop on the rail and grind it toward the bonus points. Jump off the rail once you get to them and do a No Footer. Go straight and do some high air tricks, then do another high air trick on the next ramp. Next, turn right and jump on the rail. Jumping and grinding on the rail will get you straightened up for this next big jump. Do not jump off; just let it run out of rail. After that, jump upward onto the pipe near the roof. Just before it ends, jump off. Jump on the next pipe and you should get the Secret Cover if you grind on it for awhile.