Thank you for the help to the first two questions!
It sounds like the answer to my third question is to change the filename template from the default to the ISBN. I went to this page:
http://manual.calibre-ebook.com/temp...l#helpful-tips but I'm a CPA, not a programmer and I'm fairly lost. It sounds like I can change the default filename template to something I don't need to touch, but I can't figure out where the instructions to do that are.
Thank you again!