Please check the following PDF at : http://www.open-e.com/download/libra..._file/get/131/
that will show you steps how to install DSSv6 on USB/DOM or storage LUN, as you can install DSSv6 on your storage disks, by creating a LUN with size of 2GB, then install DSSv6 on that LUN, in this way you can get red of the DOM/USB flash memory and save more slots.

Also we recommend you to use the latest builds of DSSv6 as it contain the latest drivers for your hardware.