Quote: I found exactly the same thing. I think the issue is that if lots of care has been taken to deliberately master the original two channels with plenty of separation and a decent soundstage then there's not much to be gained. In those cases it sounds to me much like a simple DSP...

I managed to get this working and wrote up a guide here: http://pcloadletter.co.uk/2011/04/05/5-1-channel-audio-through-headphones/   I think it may only work with particular versions of the CyberLink decoder. I believe after a certain point they modified its behaviour specifically to stop...