There was another theme by the Liquid author called Aqua, which I think came before Liquid. One of the main differences is that it has the solid blue Apple in the Apple Menu. It's possible it was changed to the rainbow one in Liquid because of Apple legal pressure, as they eventually got him to stop work on Liquid too. Also some system folders are not changed (like Internet).

I'll up it to your server along with the few copies of Liquid that I have.