This will be a 2-step process. First, you have to get the TTG files out of that .tivo format to a "real" video format. You can use the "pay" version of TiVo Desktop to do that or find some other way.

Then, you take that recently-converted video and use Media Studio for Blackberry (or Blackberry Video Creator, or some other similar software) to "convert" it to a format usable by the Pearl or the 8800, as the case may be.

At the end, TiVo programming on your BB.

--Mav