Thank you,
With "Mobipocket Creator" I can place a book cover with the .opf files I create from HTML. I am still a bit confused. The "Mobipocket Creator" will not recognize Mobipocket .prc files (of course, it did not create them!). Unfortunately, the "Mobipocket Reader" will recognize .prc files but not the .opf files created by the "Creator".
I hope the NAEB Cybook Gen3 I ordered will read the .opf files. That format name is not specified in the software specs.
Susan
Taking baby steps on the way to e-literacy!