Put the digital adaptor on a switch box or on the Tivo, and tell communistcast to shove it.
There is a way to use an analog DVR with digital cable, but it sucks. I can run an RS-232 cable from the digital adapter to the TIVO to change the channel, but since the digital box only has one tuner, I could only record the show that I’m already watching right now. I would be able to program the TIVO to record one show at a time, but not while watching anything else, and I would still have to pay TIVO the subscription fee since they have software-disabled the TIVO once I stopped paying. I am double screwed.