Gary,
I was under the impression that anyone could copy, edit, and tweak any airplane that already exists on G2 or one of its add-ons, then put a new scheme on it and rename it. Then they can submit their creation to the Realflight swap page for others to download and enjoy. That was what I had hoped someone else had done. Since they haven't, if I get some time soon I will attempt to do it myself. I would probably use the spacewalker as the baseline and edit it to match the U-Can-Do specs.