This whole DRM thing is moot once you have the .epub file in your hands. These nook books are just zipped up html files with a .epub file extension. You can make your own with zip.exe if you have the need or desire.
Anyone who doesn’t have all their books backed up on another computer system shouldn’t own a nook anyway...or they have too much money. You can copy the files anywhere you want and share them with anyone.
Thanks. I didn’t know you could make backups like that.