That's not quite right. I found an interesting way to import other worlds into Alice. I explained it like this:
-First create the model. I recommend deleting the parts of the model you don't need (the ones that aren't connected to parts you need for your merged model, if youneed them all, then ignore this) to shrink the file down. Make sure the all necessary objects are properly vehicled to the the main object (the one you use to move the merged model).
-Delete the ground, the light, and the camera (it will tell you not to delete the camera, ignore this) and rename the world object "world2."
-Save the file as a .a2w file, then copy it
-Change the extension of the copy of the .a2w file to .a2c (see what we're doing here? We're going to fool Alice into thinking that the whole world is a class object)
-Import it into the world in which you'd like the model to be in. You should see a new object called world2 and all of your objects underneath it.
-Drag each object from underneath the world2 object to just above it so that they are with the other objects in the main world. As you do, you should notice that as you place an object properly, it suddenly appears in the main world.
-Make sure to change any vehicles from world2 to the entire world
-Finally, delete the (now empty) world2 object and save your main world. The model(s) with all vehicles, properties, and placements should be there
The original post is here:
Importing Worlds in Alice
If you're asking if the movie thing can be done, yes it can, but you'll have to have the girls write methods which are saved to the objects, not the world, and those methods will have to avoid referring to any object but itself (technically this is optional, as importing a method with an outside reference can be done, but you have to set that reference's value to <none> when you first import it, and then change it back when you import the object it refers to).