[Worldwalker]

I'm a little unclear on why you need to move the files around outside of calibre. Kind of the whole point of calibre is to function as an interface to books, as independent of files. If you want to put them somewhere special, use "save to disk" to park them anywhere you want. Calibre being what it is, you might also want to use tags for "not started", "in progress", and "finished" so you can organize your workflow.

If you'd posted this in the calibre forum, you would have seen the sticky about file organization; read my .sig for an old version. Calibre has reasons for keeping its private files private, but there are ways of accessing them (exporting them being the biggest) that do not require disturbing calibre's internals. Several have been suggested in this thread.

As far as changing the function of buttons, you're probably going to need to do some coding for that; it doesn't impress me as the sort of thing any of the regular coders need more than they need the things they're already working on, so if someone picks it up at all, it'll go way in the back of the queue.