Saddly you can't.
The creators of cod5 waw(which does have co-op campaign) and cod6 mw2 are different.
Chat with our AI personalities
No, not really, it depends on what difficulty your playing on.
There's no co-op in the Single Player Campaign but there is co-op in Specials Ops.
The intel items in Call of Duty: Modern Warfare 2 only unlocks trophies (PS3) or achievements (Xbox 360) when the player has collected 22 and 45 of the intel items. Unlike Call of Duty 4: Modern Warfare; collecting intel items do not unlock cheats for the single player campaign.
i wish, but sadly no. only in Campaign, you can play with a friend and complete missions by using 2 guns, 1 for you and one for him.
Not really. If you don't die too much it will be a short campaign.