I have found that the free VLC player will play at least MPEG2 blu ray rips. I tried MPEG4 AVC rips and they do not work. So, at least there is something out there that is free and plays a few hi def rips. I don't have an HD DVD drive to test ripped evo. files on, anyone else that has one give it a shot, but I am doubting that it will play the ripped HD DVD's.