1. Pray that you had tagged the files properly before you uploaded them to the player. Then use a tags-to-filenames tool like MP3 Tag Studio to change them to a usable format.
2. Listen to all the songs.
3. Connect the drive to a working Empeg and use Jemplode to grab the songs off the drive while simultaneously writing fresh tags to the downloaded files.
#1. i've done this, works fine if you have pre-tagged before uploading. i use "tag and rename" which will also rename the files for you. very handy program.
#3. i've done this too, works great! in your case, you'll have to find someone with a spare working empeg to do this. Otherwise, option 1 is your only shot, and will work just fine if your files were tagged before uploading to empeg.