Okay, made some changes.
1) Added the header image.
2) Added a "Return to selection" link in the top panel.
3) Moved the text for the selection thumbnails to the bottom of the image.
4) Removed the folder name from the skin description.
5) Tweaked the CSS for all the pages.
I am considering a 3 column layout for the thumbnail page, and possibly giving each thumbnail its own background color to make it clearer in the list. Maybe an alternating color scheme.