IR code for DTV H20 or Hitachi plasma

[tivo christy]

I'm trying to bridge the gap with a series2 Tivo while I'm picking out my new HD set-up. I have the new H20 DTV rcv but I can't get Tivo to change channels on it. I'm even ok just using my OTA antenna and controlling it on the TV via Tivo, but I can't find a Hitachi code that works either.

Any help out there?

While I'm at it, does anyone have any DVR suggestions for HD w/ DTV other than the antiquated HR10-250?