v4 has "folders" for sorting your Now Playing lists. Also, I think that the "SORT" feature is always on instead of being a secret thing (while viewing the Now Playing list, press Slow, 0, Record then Thumbs up.) Finally, you get the Home Media Option so you can stream shows from one Tivo to another and also view images or listen to mp3s stored on a PC.

Keep that phone line unplugged.
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Brad B.