Without the use of SWM(single wire multiswitch) you will need two wires to a single DVR.cssamerican said:
You probably won't be able to get SWM from Directv with only two tuners(one DVR). Purchasing one can be done here:
http://www.solidsignal.com/prod_display.asp?prod=SWM-8
IMHO, it's best to run the second wire to the location you want the DVR.
Mike