Locking computer player slots

Hey I have a question regarding locking player slots to computers so that the computer slots are in their assigned slot/race when you start the game, I've seen this done in many games before and I've been using world editor for a VERY long time but I have never figured this out.|||Go to the Scenario drop down menu and click on Forces properties. There you can place the players in diffrent forces e.g. one force can be humans and another the Scourge (n.b. to place the players in diffrent forces you must first check the box 'Use custom forces'). Then you check Fixed Player Settings. It could also be a good idea to check the box Fixed Starting locations (under Player properties). Hope it helps. :)