Flash MX 2004.
document.renameScene(name)
name A string that specifies the new name of the scene.
A Boolean value: true if the name is changed successfully; false otherwise. If the new name is not unique, for example, the method returns false.
Method; renames the currently selected scene in the Scenes panel. The new name for the selected scene must be unique.
The following example renames the current scene to "new name":
var success = fl.getDocumentDOM().renameScene("new name");