i have tried this my self, you cant sorry.
Modern warfare reflex and modern warfare are the same. Modern warfare "reflex" means that its for wii. If its just modern warfare its for the other consoles
No.
If you have modern warfare 2 on any console, you can only play with anyone else that has the same console that you have. If you have LIVE for the 360, make sure it's up and running before playing online. Same for the PS3. yes this guys is right.
no because once you go online you will start back from level 1. no emblem, no callsign, no unlocked guns.
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.
Yes, by far. They are not the same kind of game and they are not rated for the same age players
No you must both have the same game.
Yes you can on split screen
Modern Warfare 2 is made by the same developers as the fourth Call of Duty (Call of Duty: Modern Warfare), but is not the same game. Both games are modern so some parts may be the same.
Yes, plus more.
yes u can
Not online but in regular multiplayer you can