Space Channel 5: Special Edition Auto Dance Cheat
Activate computer control (dancing is done by the computer) by holding L1 + R1 during the game and entering UP, LEFT, X, LEFT, X, DOWN, RIGHT, CIRCLE, RIGHT, CIRCLE. Note this is valid for part one only.
For part 2, pause (press START) hold L1 + R1 and enter CIRCLE, TRIANGLE, SQUARE. When the game is unpaused, the game should take over gameplay. Reentering these cheats should disable their effects.