Why not just rename the LRX file to something usable? (The names aren't encrypted, just cryptic) If you do it as you buy them it's not difficult to figure out which are which, unless, of course, you habitually buy a bunch of books at a time.
I just copy them to my "storage" area and rename them there. When I'm done reading them I delete them out of the eBook Library software and the funky name is gone, but the version I have stored has a name that means something to me. Neither the eBook Library nor the Reader itself cares what the filename is when it's re-imported they just go by the meta-data.
