dd will do it. Assuming the page on riocar.org has the right partition numbers then it's just: dd if=/dev/hda3 of=/dev/hdc3.
That should copy the entire dynamic data partition from the master drive to the slave drive. Swap them around if you want it the other way so dd if=/dev/hdc3 of=/dev/hda3

[edit]Probably a good idea to make sure the player application isn't running when you do this BTW. Shouldn't affect it but it's just in case[/edit]

- Trevor