The script is delivered as open-source. Below is a list of all you need.
→ Linux/Unix, Mac or Windows
→ PHP 5.2.9+ support
→ MySQL 5+ database client support
→ PHP GD Library
→ PHP Mcrypt Library (required)
→ PHP ZipArchive Library (not required but recomended if you want to be able to upload wallpaper packs, requires PHP 5.2.0+)