I'm glad I saw this thread. I didn't realize I could create Blu-Ray Discs. You couldn't with DVDSP4 on 5.1, but on 6 you can. so that super cool.
I'm still trying to confirm that and the workflow.
If the OP can detail the workflow, I'd be happy to write a tutorial.
I have a copy of Lacie's blu ray burner, Toast 8, and DVD SP 4.2 and Compressor 3.
But the OP is still a little light on exactly what is authored with what and with what menus, etc.