Ok I give up. How do I add a new player?

Ok when you load a new map you get "Player 1" as default. I want to add a "Player 2" but no where in the manual does it say how to do this. I even checked every menu command but none does this. I even went to the "Player Properties" screen but only "Player 1" existed, the other players were "shaded out" and you can't select them.

I even added the starting location for Player 2 but when I tested my map the mission quickly ended because technically only Player 1 existed in that game.

turn another player's controller status to 'user'

in the player properties

Thank you but for some reason after I did that and got "Player 2" as the computer opponent I added a starting location for Player 2 on the map and I went into "Test Map" Well when I did, the beginning screen just said "Player 1" and not Player 2 and when I got into the game the mission quickly ended as if Player 2 didn't exist. Even though I made "Player 2" the Compuer opponent.

then u have to check the fixed start locations and use custom forces and fixed player settings or something

that bit keeps bugging me as well
i go around checking/unchecking stuff and suddenly it will work

Did you give the computer player a base and units? or did you have a trigger create the units for you?

did you make a starting location? (i mean those circles)