Thank you, 'obsessed2', but I am still having issues and I just might be missing an obvious step.
My computer recognizes the file when I open it in the 'Adobe Digital Editions' program (the file is residing on a flash drive), but when I connect the flash drive to my PE and attempt to add it to my PE, I get the following:
"E_AUTH_BAD_DEVICE_KEY".
What am I missing? It's probably right in front of me, but I am completely missing it.