Figured it out. It was actually pretty easy. The groups are already there, you just have to draw a small square somewhere on the wing in order to get a "group" up in the group editor. I managed to do that for all of the groups I think. I ended up with total black for the wings. I then saved the wings to the library. Thanks for the tip and the explaination. I learn something new here everyday.. I just wish I can remember it all over the long term.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi