Probably no more than within the same house
No you can only play mw3 on xbox 360 (and pc and ps3 of course) not on xbox.
you absolutly can't
Simply go on multiplayer then click local and finally click split screen.
AWSOME
As far as I'm aware, there has been no LAN support since CoD4
The related link below has detailed information on how to play MP3 lan online via vpn.
You cannot play infection on mw3 wii version. But people found it by hacking.
Play more and read the wiki on MW3
No.
The best game by far in Call of Duty MW3. It is a fast paced shooter game that has great online game play. Battlefield 3 is another good game. I like MW3 the best!
Yes. Four player split-screen local Multiplayer.
You can't play.