Jukebox Option:
Quickly press Left, Down(2), Right, Up, Right(4), Up, Circle at the title screen. A sound will confirm correct code entry.
The 'Jukebox' option will now be unlocked at the main menu.

View Ending Sequence:
Quickly press Right(4), Down, Left, Up, Circle at the title screen. A sound will confirm correct code entry. The 'Ending Movie' option will now be unlocked in in mission mode.