Can palyers 9-10 units be place on map and be in game?
Can they be used in triggers (ai scripts and have units owned by them created?
cuz its not working for me
Can p12 have ai scripts too?
9-10 units can be placed in a game.
Also many triggers do affect them, but not the AI scripts I believe.
You can't create them, but you can preplace or give units from other players to them.
Correct. P9-11 have strange alliances, and P12 is neutral to all.