The HR2x cannot be used to bridge your other equipment. For that you need another DECA adapter and a network switch (hubs are eeeeeevillllle).
If it were mine to deal with, I'd (in order of preference):
1. run a CAT6 cable
2. move the router to a better location
3. use a second DECA adapter off a splitter on the HR2x line.
Obviously options 1 and 2 are independent of what wiring technology you're currently using and option 3 requires that you are already delivering the DIRECTV signal via SWiM.
If it were mine to deal with, I'd (in order of preference):
1. run a CAT6 cable
2. move the router to a better location
3. use a second DECA adapter off a splitter on the HR2x line.
Obviously options 1 and 2 are independent of what wiring technology you're currently using and option 3 requires that you are already delivering the DIRECTV signal via SWiM.