Plus the latest few versions of jEmplode were fixed up for the Central so that all the tag information is copied (previously only the song titles and maybe track numbers were copied and all of the other fields were copied)....
The feature you want to use is called "Export" and it is fairly stable. I've been able to copy upwards of 40-50 GB in one long session without any errors or timeouts, etc.
Randy
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Happy owner of 2 Centrals, 2 Empegs Mk2a 160GB, 1 Empeg Mk2a 60 GB, a Rio Riot, 4 Rio Receivers, and two 1GB iPod Shuffles...