Ok, I see. You can group all objects using the Ctl+G command (PC), but this won't make it one object, yopu wont be able to save it as .vob, for example. So you want the group to be duplicated on a new scene? It will be the same group of objects all over a new scene? You can simply group all your object and duplicate them in the existing scene, no need to open a new scene for this. You can also save this scene, and merge this scene with another one using the File, merge command.