I have accomplished much with photoshop 6.0 alone
I made the wall in my blue planet dx theme with just photoshop 6.0 by looking for a picture of juipter and studying how it is shaded and how the clouds affect each other then I tried to replicate this with photoshop
I did the stars with the pencil tool
I did the sky with a gradient
I forget how I did the rocks though
here is a link so you can understand what I am talking about
https://www.wincustomize.com/skins.asp?library=31&SkinID=2929