You should check out <a href="http://www.themexp.org">ThemeXp.org</a>
Look at the Visual Styles. You have to go <a href="http://www.tgtsoft.com/download.php">here</a> and download the UxTheme Util. It is a .dll file that you have to boot to safe mode and replace in your system folder. After you do this, you can change your visual style by downloading them from themexp. It is a really cool way to customize your desktop easily. Hope this helps.