I once (some time ago) tried to repaint the 787 to. But I found out that it's the hardest plane to paint in FlightGear.
If I look to your screenies I see that the lighted wing part is missing/translucent. Light.rgb is the texture file of that part of the wing, have you changed that?? I sometimes see that if you change a texture something strange happens in FG. I don't know why, but at least you know where the problem probably is now