nikknight, I have been busy and had a few programs to record using the PVR-2, so I haven't had the time to experiment.
I tried trimming a video with tsMuxer, and it produced a file, except it was in 2 ch where the original was in DD 5.1. I can't find any settings that might make a difference, but does it work correctly for you? Am I not following the correct procedure? I check the "enable cutting" and set the start and end times the hit "Start Muxing". Do I need to demux first, then mux the files?