Plaster is a very easy to use application that offers you the possibility to quickly add images over the classic folder design.
To start using Plaster you must drag and drop a valid image over the application's main window. If you want to copy an image from another folder simply press the Shift key and then drag and drop the folder over Plaster's window.
The Plaster 'Advanced Settings' panel allows you to specify the initial squaring operation, the border color, if you want to use rounded corners and more. When you finish adjusting the settings, simply drag and drop the folder you want to process.