Are you saying you want every copy of, say, a hero sprite to have its own attached copy of a sword sprite? If so, I think you want a container. Go into the hero's properties, find container, click "add object," and click the sword object. Then, every hero you make will automatically spawn a sword. Then the events would just be:
on hero created->set sword position to hero(image point 1), pin sword to hero.
Or did you mean something else?