Pause the game, then hold Numpad 7 and press Spacebar, Spacebar, Spacebar, C, V, Up, Down, Left, Up, C, V, Spacebar, V, B, Spacebar, V, B. The pause screen will shake if you entered the code correctly. Next, select the "End Run" option from the pause menu. All cheats, FMV seqences, and skaters will be unlocked.