We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
2 Hypothetical (at the moment) questions
1. Book published in paperback form. Would like to make a Hard Cover version with a few drawings/sketches on those blank pages that I purposely left just for this option Is it just a question of another revision, or do I need to do a new project?
2. If errors were to be found in a print book after publication, what are my options as to correcting said errors?