The skin allows you to launch the associated applications, open websites or folders. It has 3 tabs, one for websites, one for applications and another for folders. You can modify the elements (icons, messages and targets), editing the included files: Icons.inc (indicates the icons), Messages.inc (contans the messages associated to every icon) and Targets.inc (contains the urls and paths of applications and folders). In this files the variables looks like: Icon12, Message12 and Target12. Here the numbers indicates: first the tab and second the icon on that tab. For icons you can use any png image, it will be resized and placed at the proper place.