I'll take a look when I have time. Otherwise, I know you're a member at AVS, so why don't you post there?
http://www.avsforum.com/avs-vb/showthread.php?p=16230487

I hope that you can get the secondary with mch analogs.

Ya know, you can also try a secondary optical connection, with other settings... just for situations like this. of course, it'll all be lossy, but so what. It's PIP.