i really want to know if i could play games multiplayer mode using a multiplayer screen and if i cant can anyone tell me the ways to play multiplayer with the pc like modems or is thier a way to directly conect to each other or can i make a game connect to the same pc to play multiplayer on the same pc like call of duty multiplayer on the same pc

More information is needed in order to give a useful reply... How about computer, operating system, configuration, game being played, etc.

when i say games i say games like two worlds or gears of war or any games
and i have an xp and and its multi screen compatible