1.unitname fire"weaponname",unit will fire his takenweapon but he'll shoot to sky,in my opinion "dofire" can't work to object,but if the object's side is not empty what'll happen?
2.yes ,I know there is a object called "reshouseinvisible_house",I can set it by using the command xxx="reshouseinvisible_house"createvehicle getpos POS,but it's side is "empty",can I set it side=="west/east" by editing the mission.sqm then west soldier will fire to it because of the target's side is east ?