When you say "messes with regular SD television" what do you mean? I keep my S3 set to Native resolution, 16:9 shape and LCD Aspect (or at least I think that's what it's called off the top of my head). I also set width=1920 and height=1080 in my pyTivo.conf. 1280x720 content transfers and fills the screen. 1280x528 or other cropped content displays properly with a little black at the top and bottom. SD content is pillarboxed both when I transfer it and when I just watch it off the cable. Are you trying to get SD content to fill your screen instead of being pillarboxed? On the rare occasions when I actually wants this, I tend to use my TV's zoom controls and not mess with the Tivo's settings. But that's just me. Also, I second wmcbrine's suggestion that you not use non-standard resolution settings. Choose either 1920x1080 or 1280x720. The native res of your TV isn't a standard Tivo output resolution.