Clone Block-By-Block Drive Leopard Trouble

been working with Drobo Support, up to Tier 3 and I was told to clone with Stellar Phoenix on Mac OS X. However, the support person has no idea how to use the program, and the documentation for said program is worthless.

The predicament is that I did a clone to DMG using the program, of which the Tech agreed, but now am i unable to restore that to the hard drive since it is unmountable.

does anyone have any experience doing clones like this? I have Data Rescue as well, should I use that to clone?

any help would be very very appreciated, because for the moment it seems as if Drobo Support is unwilling to help, they can tell me to fix the drobo array i need to clone drive, but just lack the know-how to help me on my Mac, seems a little ridiculous.