FYI: Apparently the algorithm for PS is as simple as restarting a timer after each remote button press, and when it gets to 4 hours, buh-bye. OK. Fair enough. So what happens at the 4-hour mark if you are trying to dub off a folder full of programs in consecutive order to a DVDR? (I only do this when I have a dying DVR that will not record but will play back). You guessed it. Buh-bye! So the object lesson here: if you need to play a folder full of more than 4 hours of programs, turn PS off.