How do you get invincibility in Star Wars Battlefront 2

The original answer was: "you cant, sorry." which is actually wrong. To get invincibility in Battlefront II, first start a level in singleplayer or splitscreen mode. Pause the game, and hold down L2 and R2. Press "up-up-up-left-down-down-down-left-up-up-up-left-right" on the directional buttons. If you hear the same sound you hear when you pause the game, then you inputted the code in correctly. You will now be unable to die, unless you fall to your doom or respawn. If you type the code in on splitscreen, then both players will have invincibility. I'm not sure about the other versions, sorry.
For Playstation 2, pause the game. Then, using the D-pad, input the following code: up, up, up, left, down, down, down, left, up, up, up, left, right.