TrueTransparency

You need to add a category for TrueTransparency. This is a relatively new application that allows you to modify windows in ways that .msstyle files can't. MsStyles do not allow you to have transparent/translucent window borders. Also .msstyle files were not designed to have wide, irregular window borders. TrueTranparency has these capabilities:

http://www.crystalxp.net/galerie/en.id.5139-truetransparency-lefreut-explorer-tools.htm

You have these skins available on your site but they are listed under "Misc Skins" when they should have their own category.