So I have a lot of converted .pdf and other format files and books (public domain stuff and some personal files), which I exported through Stanza and converted to .azw and USBed to my Kindle. This, of course, was before I knew anything about metadata and mobi2mobi, so I have many many files with gibberish names. Is there any (relatively simple) way to rename already converted and loaded books once they're on your Kindle so that they are easily identifyable on the list of books? All the information I've found indicates you need to change the metadata before converting, which suggests to me that I'm out of luck and have to make notes for each book so I know what the heck they are. Thanks for any help!