I am presently a Dish customer with four dual-tuner HDDVRs. Each DVR is feed with a single RG-6 coax that uses a separator to feed the dual tuners. If I were to change to DirecTV, is a similar setup possible? Do not want to bring in any more coax runs. Also, with DirecTV HDDVRs, can you run them is dual modes for separate location control of viewed channels?