To access the regional themes that do not appear in the Personalization menu by default:
When exploring an open directory of Windows 7 themes, you will typically encounter specific file extensions. Knowing these helps you identify what you are downloading: Intitle Index Of Windows 7 Themes
Be wary of .exe files disguised as themes. Authentic themes are almost always .themepack or .deskthemepack files. To access the regional themes that do not