If the person commands or brings 0 bounders to anywhere then create another one for that player. To make the units not attack the dieing units, either make the dieing units invincible or set the human players to ally with the computer.
Take a look at the triggers in this bound
http://www.staredit.net/index.php?download=2195[right][snapback]371182[/snapback][/right]
Dude I mean the end of the lvl. when u move to the other side!