"Special Move" is a drag'n'drop application that let's you enable or disable the auto-extraction feature of disc-images (".dmg" files) that was silently introduced with MacOS X v10.2.
About "auto-extraction": If you enable auto-extraction for a particular disc-image, "Disk Copy" won't mount this disc-image, instead it will copy the content of the disc-image to the folder that holds the disc-image. If the disc-image holds multiple files it will wrap those files inside a new folder. Last not least the disc-image will be automatically moved to the trash and "Disc Copy" will disable auto-extraction for the disc-image.
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