Alright so I'm making an installation map with triggers and stuff. I've got all but two of the available players on my force. I'm player 2, player 3 is neutral (and it has the unit I'm trying to order) Player 1 and 7 are on the enemy force and the rest are rescuable. Basically what I want to happen is my units come across a group of rescuable civilians who then get attacked by the enemy. I've gotten this down by switching who controls what so I end up with just the civilians while my squad is traded to a neutral player (temporarily). What I want to have happen is the neutral player 3 has a Zeratul that I'm trying to order to the location of the ambush to slaughter the enemy (Blizzard did something similar in some campaigns I think). The order gets the Zeratul there but he doesn't attack. If I switch that player to human or rescuable I can't give the order. If I put him to comp and in another force he attacks my guys. Any ideas how to fix this? A speedy reply would be much appreciated.

Neutral units won't attack anything.

You need to give Zeratul to a computer player and use the "Set Alliance Status" trigger action to set player 2 as it's ally, and players 1 and 7 as enemies.

Worked like a charm! Thanks a lot man! I'm making this for someone and I was starting to worry I wouldn't finish it in time.

Glad I could help. Keep it up =)