It would be nice to be able to duplicate a fixture and all of it's uses instead of just adding another fixture to the DMX address list. This would require parsing all the scene/generator files and copying the information from the source fixture to the target fixture. I don't know of a way to do this right now.
1. I add fixture "A"
2. I create several scenes with fixture "A"
3. I duplicate fixture "A" with fixture "B" using "Duplicate Fixture" and I choose "Yes" to the prompt that asks me if I want to duplicate all scenes and assignments.
4. When I active a scene I created in step 2, both fixture "A" and "B" do the same thing.