BBAssets contain an object that contain nodes the give an object a specific behavior. These are what are called Smart Assets in BB3.. You can import the bbasset either by dragging it into the 3D World or clicking on the little plus sign in the 3D World located at the bottom of the 3D World object list and just to the left of the little trash can icon. After importing the bbasset, it will be on the bottom of the list of objects on the far left of the window. Double-click on the object to open it in the Node editor. You will see all the nodes that determine the object's behavior. Double-click on any node with a little pencil icon to see the associated JavaScript.