you have to get an ethernet cable and cut through it just slightly until you find the wires inside. then, i think, you get the blue and orange wires? or blue and something, i'm not sure. then get a light switch and unscrew the, well, the screws i guess, and stick the wires in to the slots. then screw them back in. plug the ethernet cable into your ps3 and into your router, start up a game, hit the switch and everyone on the other team will not be able to move, then you can walk to their spawn and kill them all!!!!!!!
or you can use it in tight situations to get more kills because half the time, if you use it in the beginning, they will just leave and you probobly won't get your kills