I checked with Tivo and the only response I could get from them was that Tivo does not support universal remotes and recomments using two remotes. I look on the web site of a major seller of Tivos and discovered that all peanut-shaped Tivo remotes are compatible. Actually that is only partly true. Premiere4 and PremiereXL4 have 4 additional buttons (red, green, yellow, and blue) and no Tivo 1-Tivo2 switch on them. So one needs to be careful which which Tivo remote you try to use on the Tivo Premiere models.