That would work, you just have to use a small location. Also, don't give the Marines back until they all get orders. But, you need a way to keep track of which to order to where, which would go back to my at least and at most triggers.

[right][snapback]73217[/snapback][/right]
Na you just do this. You don't even need a extra location, as long as the location your spawning all your units in contains all the units created there (no units created outside of the spawn location)
Then it would do good to copy the sequince of those 6 actions many times or copy the whole trigger itself. (so you don't have to wait for a trigger refresh). If you were so incinded to save players you could actually have playerB be a human player (by selecting the human force) .