Extra Weapons
Go to the Worms option screen,then go onto the Weapons option screen. Move the cursor away from the exit logo and press these buttons: X,X,square,X,X,square,X,X,square.
To get better worm and weapons
Go to the weaponmeny, put the cursor where it dosen`t mark anything and press the following: X, Square, Square, X, Square, Square, X, Square, Square.