QUOTE (Nyerguds @ Aug 17 2010, 12:42 PM)

do the APCs have passengers though?
That shouldn't be a problem too, since it doesn't makes a difference afaik if you spawn a fully loaded APC outside the map or inside on a certain cell.
So it should be a simple remove unit, spawn new unit trigger, that happens so fast that the player won't even notice the unit has changed.