1. Extra time:
At the loading screen (after slecting character etc...), press and hold L1, L2, R1, R2, T, O, S, X, and Left until mission starts. The Timer should now read 999 seconds....
2. Access all missions:
Press Up, Down, Right, Left, Down, Up, Triangle at the Mission Select screen
3. Access all aircraft:
Press Left, Left, Right, Down, Up, Down, Right, Select at the Fighter Select screen. A shout will confirm correct code entry.
4. Easier Camera Angle:
Press and hold L1, L2, R1, and R2 at the Fighter Select screen while choosing your plane. Keep holding until the game begins. You should now have access to one more camera angle