Fred, you might want to look at this forum that CB919 mentioned in another thread. I only just started checking it out, but it seems to have an incredible amount of info there. This section seems like it would be just right for your questions.

Maybe worth a look.
http://forum.blu-ray.com/forumdisplay.php?f=35

This thread looks like it would pertain to your questions:
http://forum.blu-ray.com/showthread.php?t=99689

Last edited by Papa D; 05/27/09 11:13 PM.