I am in the process of hooking up an SD TiVo next to my HR20. Being a bit short on cash until after the holidays I was going to use the multiswitch I was using with my dual LNB dish. As long as I stay away from the HD stations on the HR20 it will work right? I have an eSata added so I can load it up with HD shows and watch them until I get a new multiswtch. The set up will go like this: >Four lines from the 5-LNB dish. >Two go to an R15. >Two go to the den. Here I will add the multiswitch temporarily. >From the switch two lines each to the DVRs. Later on I wll put a new Zinewell in the basement and run extra lines to the den.