Well, this is not really a fan art piece but the very mural from the game itself remade from a couple of pics from MobyGames.
Now: How can you turn this ...
... into this?
With a lot of work. With a lot of work.
This is the full image: 1695 x 545 pixels.
New, new Link: http://www.sendspace.com/file/myigcl
And still new link: http://www.mediafire.com/?8jdxeanggyw
Just my two cents.