I've spent an evening fooling around on windows and came up with a nice windows backup-utility.
It requires displayserver running on the empeg.
It takes the CSV-dump from emplode as input and will save all MP3's in one directory. Files are stored as on the empeg.
This way you can select which files to backup by editing the CSV file.
Anyway, download it from http://empeg.dyndns.org/empeg/displayserver1.1/empbackup.zip and give it a try.
Note: No checks are made if the CSV file is valid or the destination directory exists, so make sure everything is filled in correctly

Frank van Gestel