wow, fast replies.
#1: I don't know how the dx's collection system works as I am using the kindle 2. Post your system/collections.json (if it exists) and I'll see what I can do. either that or test the utility on it (after making a backup of course)
#2: Sadly that not a possibility, I would have really liked that as well but the file structure / kindle2's software doesn't lend itself to that kind of functionality.