This is the Mule and cargo Skid that can be used with my 2011 Firefly add-on. While they were designed to go with that add-on they are separate ships and do not require the 2011 Firefly to be used.
Orbiter 2010P1 only because of the use of spotlights.
Tested in the D3D9 graphics client but not sure about the UCGO in the client.
It is fully compatible with the 2011 Firefly which greatly enhances this add-on.
Please read the included PDF for more information on this add-on.