Kartu thanks for the link. It quite looks like what I want, but I would love to see this right on the reader. As for the functionality, creating and sorting collections works well enough with the Sony software. I would just love to set up collections (can be done in the Sony soft) but then just drag and drop all books/files on the reader and put them there into the appropriate collections.
But thanks anyways
I'll probably give it a try and see if it works better/easier than the Sony soft.