jool1.png and joolLayers1.png are white clouds. You could color shift them. Try different shades of green. - - - Updated - - - Paint.net can be used to make the compressed dtx files. It's deffinetly a bit on the involved side of things as you can end up with flipped textures and such. Something for Astronomer to consider. The default loader also leaks as I hear it, so that's another reason to do it, but it is work.