yeah, some people were saying they managed to get the initial call done through the external serial port on it hooked up to another computer via a ppp connection. I wasn't so successful...well, actually, I got frustrated so I walked next door to my neighbor's house and did it that way.
there are a few web forums that have good information on them. just be warned that the people there aren't as nice as the people here. be sure to search for answers before posting, unless you have a nice THICK asbestos (or nomex) flames suit...
here's a few links:
Tivo Community
DealDatabase Forum
Tivo Techies
hope this helps. I'm a happy owner of a 03 4runner, (1) Sony SAT-T60 DirecTivo, and (2) Hughes SD-DVR40 DirecTivos...oh and an oem nav for that 4r...life can't get much better than this.
Kev