LIst of commands:
1. Press Square: to make the DPAD-up and DPAD-right for a vision menu.
2. Press Square again: to make DPAD-up for noclip, the DPAD-right for unlimited ammo and no fall damage and to make the DPAD-down for a zombie weapon (default weapon).
3. Press Square again: to make DPAD-up godmode, the DPAD-right a teleportation to some place on the map and to make the DPAD-down for less gravity (3/8 of normal gravity).
4. Press Square again: to make DPAD-up fast restart (so you go to the 'chose a class menu'

, the DPAD-right for more xp per kill (do first DPAD-right then DPAD-up to make more xp work) and the DPAD-down for even more xp.
5. Press Square again: to make DPAD-up for changing the colour of the map, the DPAD-right for changing the colour of the map again (to something else) and press DPAD-down to toggle map effects to something else.
from here it will start all over again so:
1. Press Square again: to make the DPAD-up and DPAD-right for a vision menu (again)
2. Press Square again: to make DPAD-up for noclip, the DPAD-right for unlimited ammo and no fall damage and to make the DPAD-down for a zombie weapon (default weapon).
etc.
Note: I did put a number infront of the 'Press Square'. THis might not be the right order. Maybe if you press square once you start at number 3, but you will have to try that yourself.
Press L2: to get a rpg.
press R2: to sprint faster and change your jumping height very high (press R2 again to get your jumping height lower again).
I haven't tested the hacks so I don't know if they work sorry for that =P I just wrote down what the buttons do.