I dont thonk it can be split up because they work together as a family very affirmitive.
on split screen, no, on live, yes
yes
you cant
Campaign screen.
You can't
Unfortunately no, you can't play multiplayer on Call of Duty Modern Warfare 1 or on Call of Duty Modern Warfare 2 on the same screen. But on Call of Duty Modern Warfare 3 and Call of Duty Modern Warfare Black Ops you can play multiplayer on the same screen. There is an new Call of Duty Black Ops 2 coming out soon though, so I expect that to also have that feature, since its newer.
you go to the menu screen, jk who knows
You can not play split screen on multiplayer. It also left me confused
You can only do split screen if the person you are playing with is with you.
no
No. None of the Modern Warfare series have been 2 player online (aka. online split screen).
no not possible