Originally Posted by LadyWriter
downloaded kindlegen no problem ... finding something called terminal.app? PROBLEM! lol I have no such thing on my computer so is this a MAC thing or something?
Terminal.app is indeed a Mac program. Windows equivalent would be the DOS command-line, only not quite (probably need Cygwin installed). As regards your other point, I'm afraid we can't really discuss that in very much detail on the MR forums.
However, you'll need a different set of tools for that, which can be located readily enough elsewhere. Kindlegen's just for creating new Mobi files, not making changes to old ones.