thanks...
If you ever do make this possible with the added jacket file, it would be even better if you could make the metadata compile the comments also much like the tags use all tags in the books being merged.
That's my goal so that when opening a bundle you can already have the summary of books available first - all books. Using what is already there in each book is typical and would shorten the process considerably vs. a bunch of copy/pasting and moving back and forth to do so.
I know Calibre updated awhile back to add comments vs. overwriting existing comments when downloading metadata.
If you know of some plug-in out there that makes the compilation of comments from multiple books into one file or log or something easy to run and copy/paste from a clipboard, LET ME KNOW. I haven't found it and do not know how to write it.
Thank you again for the input. A donation for the essential plug-in is on the way.