From Apple: Disk Copy Scripts and Disk Image Plugin

Apple recently released Disk Copy 6.3 Scripts and Disk Image CM Plugin 1.3. The scripts are examples of how to use AppleScript to control Disk Copy, and gain access to features not present in the user interface. The Plugin "will mount disk images from a contextual menu. It will optionally verify the checksum of the image. It does not require the Disk Copy application to be present."