Considering your other post, I'm not sure what is the situation on your machine right now, but in any case the info I wrote in the other post can just help...
To access the disk image content, you either drag the folder back to espionage and once recognised, you click on the minus sign and Espionage will ask if you want to restore the folder back to normal, or, you can download the ivisible application from this link
http://www.macupdate.com/app/mac/24682/ivisible make the invisible files visible, visit the folder saying it has protected data, you will now see a disk image with name starting with dot character, doubleclick it, it will ask you for password and once entered it will mount like any other disk image, copy the data out and once done, eject the disk image and delete the whole folder containing the disk image.
Rgds
Zsolt