If you dont know already, check out my PJB forum here:
http://groups.yahoo.com/group/pjb100/
Firm-and Software allowing you transfer of files back off the PJB are available so you can put them on the empeg no problem I assume.
However, for the future think about a mirror of your MP3 files on a huge pc harddrive so you can easily sync up your portable MP3 devices from there, also saves you b*tt in case of portable device disk crash. Also, the more MP3 gadgets you own and use, the more complicated it becomes to keep them all in sync, so all I do it keep my PC in shape and sync of my portable devices from there, and only from there. Tools for every platofrm are available, if there are no tools then dont buy the gadget :-)
Greets Slug, frohe Ostern!