I am working on a map where I would need spells from each of the three races of starcraft to use spells. From a recent nuke problem, I found I needed a Terran computer to run a specific script. Unfortunatly, I don't want to cut back too much on the player number because of how many people quit mid-game.

I was wondering if there was a race setting where an enemy computer could account for all three races, (such as a neutral computer turned into an enemy).

Nope, you need the race to coordinate with the AIs being used on it, no player other than 1-8 can use AIs, so extended players aren't an option

If you need all 3 race AI scripts to be used, the most human slots you can have are 5, since humans can't run AI scripts (Mostly)

So, I guess it is best to use four computers and four players, one player being the neutral town of course. I guess four players is a decent amount for an Rpg map. Thanks for confirming that Pyro.

You know, you could just have 3 players, one of them be the neutral, and run the AI script and give afterward. The AI script orders will still run, even though it's not the same player. You can even run an AI script on a computer player and give to a human.