You can find winrar themes at www.win-rar.com/themes.html, Find the theme you want and download it to the desktop (or where you want). Then when it finishes, double click it, it will ask you if you want to install this theme, click yes. It will be under "options>themes>your theme". If you want to change the name, double click the theme you downloaded, but when it askes you to install, click no. Open up "winrar_theme_description.txt" and change the theme. And there you go.