Try with multiAVCHD, in this post
http://forum.doom9.org/showthread.php?t=143744
As for your other question, BluRay supports up to 27.7 Mbits, of 44.1 up to 192kHz, 16 up to 24 bits, and 8 channels audio, so it should be able to support 96kHz/24bits/8-channels audio or 192kHz/24bits/6-channels audio.