I have an extra cable required to install a second drive into an Empeg. It's the exact replacement for the second drive. I have detailed instructions for installing the second drive at http://dmoore.com/empeg.htm - worried about voiding your warranty? It's just six months so it's almost up anyway!
The cable is $20 including shipping (I had to order this from the UK and shipping is three times what the item costs). Contact me at empeg@dmoore.com for more info (DO NOT REPLY TO THIS POST!).
Thanks,
david