Yep. Got it. I have a PRS-Customized Reader with Books By Folder! Will write a how-to in a few minutes.
Meanwhile, a few suggestions/bugreports:
1) I can't get Books by Folder to work on internal memory, even with your standard image. It just won't display any folders. SD card works fine, though.
2) It might be a good idea to place both autorun.js and addons/* to an extra directory. /Sony Reader or /database (since it has to exist anyway) would be a better starting point, IMHO. That way the internal memory will remain uncluttered by unneeded files and folders where they are in full view.
Last edited by pepak; 12-07-2009 at 12:49 PM.