As far as details go, I just wanted the player, an engineer, to deactivate 5 mines to clear a path for following armor. I can still do this, just cant tie it to an objective. Thats OK though, I just thought it could be done. I thought it would work with grouping the mines to triggers with the "vehicle" and "Present/not present/or not alive" options. The game has to recognize them with some type of command, as when you deactivate them they filp sideways!
Finding the key seems to be more work than its worth at this point, but I hope I am wrong. Thanks all, for your help.