The WinCustomize gallery system is large and often complex with many different ways to access, sort and display skins. At a glance you probably wouldn't even notice most of the options you have at your disposal, making it hard sometimes to find what you're looking for.
While WinCustomize v6 will improve navigation & UI presentation, for the time being we're stuck with what we have. To help folks out, Island Dog has written up a detailed guide on how to use all the Gallery bells and whistles. Screenshots point out exactly where to click and what's what.
A screencast will follow shortly.
If you've ever felt lost in the galleries, this is a must-read guide!