Depends what you mean. If your controller broke/died turn off the system, unplug/unsync the controller then turn on the console and plug in/resync new controller. If you mean how can 2 or more people play on the same console on LIVE/PSN it's not possible with Call of Duty. Only one person per console on LIVE/PSN. You can however make a private LAN server. Other games like Halo allow 1 or more people to use the same console and play on LIVE.
No you can't on the Wii because there is no plug for your controller.
I personally use the Xbox 360 controller.
camt
mabey, mabey not, ps, call me
no you dont, you use the controller
Yeah, you can buy modified ones for the PC.
Some times
Yes but I advise you get the other controller for the wii, the one that looks like a xbox or playstation controller
No, you have to use the microsoft headsets that plug into the controller.
On the PS3 you use the controller setting on the console
I think that you can use the original Classic Controller though I am not positive. However, I am positive that you can use the WiiMote and nunchuck or the Classic Controller Pro. I also know for a fact the gamecube controller does not work.
if ur using the classic controller u press X