No instructions with mine, but it was pretty easy to get up and running - just SSH into the box once you see it appear in your dhcp leases - credentials are username:root password:cointerra - then you edit the cgminer.conf in /Angstrom/Cointerra and add your pool info.

You can do it via the web interface too, but I found editing the files to work more reliably.  Let me know if you need any help setting it up via PM.

Will