Figured it out, for some reason the trigger wasn't initializing :S. But I'm still not sure how to make it so that there are preset players.
Right... here's a little tutorial
I use NewGen WE, so it is slightly different, but you get the point.
Inside the world editor, go to "Scenario" -> "Player Properties"
Now you can set the amount of players you want and choose if it is going to be a computer (NPC), or a user.
In my example, I have used 2 Computers (the "bad guys") and 6 users (the players who will need to defeat the bad guys).
I have set "Fixed start location" to true, so red will start at player red start location (otherwise, it will random the start locations).
After that, we need to set forces, because we want the good and bad guys to be a team.
For that, we need to go to "Forces" and add a force.
Rename the forces to whatever you want, I have called them "Players" and "Computers", but that is completely up to you.
"Allied": the players will be allied and won't attack eachother
"Allied Victory": if one player wins, everyone in the team wins.
"Share Vision": well... they share eachothers vision
"Share Unit Control": Erm, I'm not really sure, but this is probably just to move units, attack, stop and cast abilities
"Share Adv. Unit Control": To create buildings and learn abilities with anoher player's unit, I think you will need advanced unit control...
I hope this is what you ment with "preset players" -.-
