I'm thinking of buying a PVR. But before I do that, I need to know if it'll work on my apartment. The cable in my apartment is the old style cable with cable A and cable B coaxial feeds. I have a cable box that switch between cable A and cable B before sending the signal to my TV. Does anyone know if PVR like Tivo or ReplayTV can accept 2 coax cable feeds for the old style cable? If not, is there anything I can do to get a PVR to work with my cable feeds without having to buy two PVRs?