im pretty sure that saying other are lazy and saying they dont want to try is, in a way, calling a person a noob. now gtfo now, your starting to piss me off.

Co-operative campaign levels by definition require syncing Ai so Yes you did ask for it.
Yes it does. When you play the campaign levels they are populated with AI and that is what the 2 players are fighting against. Since the AI do not sync across the network each player will see the AI in different places and at differnt times doing different things becasue the AI runs on the client and does not sync its position, health or status across the network. This is why you can't have a co-op campaign level where you play against AI.

If, however, you want just the campaign levels made into a multiplayer maps with no AI in them then many have already been made and you can find them in the file archive.

But that is not what you asked for. You specifically asked for a "co-operative campaign" which can not be accomplished in a Halo CE map. inside, outside, under, over or on top of the box.
You have to be clear in what you are requesting and you need to understand what is actually possible. You have done neither.

Dennis can you please lock this?