It's even quicker if you've got a PC available and a laptop IDE adapter. You'll need a Linux boot CD though (Knoppix will do) to run on the PC. Run the builder image on the new drive. Plug both drives into the PC. Mount both music partitions and copy away. Unmount the partitions. Shutdown the PC and install the new drive into your empeg. This is if you're comfortable with Linux and okay with moving all the hardware around.
I just plugged my old 20GB and my new 60GB into my server and copied the files straight over.

- Trevor