File restore from Image backup using Command line commands

Has anyone ever tried to do a file or folder restore, from an image backup, usng command line commands?

I have a lengthy exercise to identify all the clients that generate the "Partition not supported" (or similar) message when the yellow files button is selected from an image backup. I have 5 or 6 hundred clients, and I'm trying to avoid having to open each one just to hit the yellow file/folder button, to see if each one works. I already know of 12 that don't work, so I can test a command...

I have high hopes there might be a command I can script on the utility node or on a proxy server to see if it can read inside the vmdk's.

Anyone ever tried it?