Advertisements Just saw a commercial for this. Showtime: It's All 4 You Free Preview Weekend, 03/31 - 04/03 on channels 285-295. This was on Dishnetwork...this is the same thing they did for the HBO free preview weekend. Instead of opening the existing channels they are duplicating them to a group of unused channels. This stinks for TiVo recording because you have to manual record everything. Is there any chance that TiVo would dupe the guide data for those few days to those corresponding channels?