At the "Imports" screen of Disc 1, press Square, Circle, Square, Triangle(2).
At the "Code Archive" screen of Disc 1, press Circle + Triangle, Square(2).
At the "Code Archive" screen of Disc 1, press Square + Triangle, Circle(4).
At the main menu of Disc 2, press Triangle(2), Circle, Triangle(2).
At the main menu of Disc 2, press Circle(2), Triangle, Circle(2).
At the main menu of Disc 2, quickly press Circle, Square, Circle, Square, Circle, Square.