Well, if I am not mistaken as far as the colors are concerned the only thing that matters is the .css file, you can ignore everything else in the zip. The OS doesn't matter - replace the moi.css file from your installation with it and see if that works. It sure did for me on Win.

And then from there you can selectively chose what you want to override (probably a handful of icons, but that's about it), and also doing some editing in the .ini (and/or the regular options menu in the application itself) for things like bgcolor and antialising.