Using PC Engine icons works great for the skins since they are already only a few colors....using anything else (images, sprites) don't work out so well.
The design of this skin has been quite a challenge for me as I'm trying to create a design in a very small space - for example, the PCE you see on the ship is only about 25 or so pixels wide. When gfx get down to this size, things get all bent out of shape (and you can forget anti-aliasing!). When I'm totally done with this skin, I will submit it for publishing so that anyone can use it if they would like.