Do this while playing. Hold R1 and then up, left, right, square, circle, X.
On the last level when the clock starts go down the ledges and on the second from last ledge do a running jump and you should land in a short cut.
Be sure that the option light bulb lights up.
On the screen where Abe says "Hello", hold R1 and press Down, Right,
Left, Right, Square, Circle, Square, Triangle, Circle, Square, Right and Left
Hold R1 and press down, right, left, right, square, circle, square, triangle, circle, square, right, left.
Hold R1 and press up, left, right, square, circle, triangle, square, right, left, up, right.