As mentioned above, the Genie REQUIRES the new DirecTV SWM technology. You can update you MotoSAT with the SWM8 switch and a 28/29V power inserter but since the Nomad cannot use the SWM signal you also have to add a multi-switch (6X8 I believe) so you can run the 4 outputs from the base of the antenna to the multi-switch, 4 outputs from the multi-switch to the SWM8 switch and then a 5th cable from the multi-switch to the Nomad. As long as you current have at least 2 cables running from the MotoSAT to the Nomad and your current receiver you will not need to run any new cables inside, only add some hardware and cabling to the roof.
You can get the best detailed information on this update at
www.datastormusers.com . You will find many MotoSAT dealers and users there.