So far I've deciphered the majority of the inner-workings of these .rwtheme files. Whilst fooling around in one, I found .css files unused but theme as far as I could tell, though I find it curious that these .css files seem to be managed from a property list within the .rwtheme file. Suggesting, as I know you're thinking, that someone intended for these different .css files to be easily swapped, perhaps from within RapidWeaver, though I have seen no such option myself, and have had to edit the .plist file manually to change the path to the desired .css file. Reguardless, here is the first attempt at crafting my own .css, and bg images to boot! I somewhat like it, though it may require review, and as you might have noticed it still borrows heavily from the style of the original. So, just a quick update on that front. Seeing as how I did all of this today it is more than likely you noticed none of it.... oh well.... still working on the lightbox thing too, more on that later