I looked for it, but no one has asked about this that I know of.
I own an iPod 5.5G and Rockbox, and I like it, you can edit almost everything. But you cant edit the Main menu; as far as I know, it's just the database. I would like to get rid of things i don't use (i.e. recording) or add useful folders. (i.e. \Gameboy\) Th OF had it, and it took me a while to realize that Rockbox didn't.
I saw this image though, on the icons Gallery:
How did they do it?