What do you need one for?
By following your manual instructions for installing the gallery, I manually modified the files for "celticdreams" by following the style instructions for pro-silver, that you provided. Just one small bug I haven't gotten around to fixing yet, but still, if you include manual editing from one style, it can be applied to all styles.
The only real issue is the additional graphics, and the look of them to integrate into other styles. I might be mistaken, but it worked at least for me.