I’m still getting an “Unknown Format” error. Here’s what I tried…
Encore CS4 > build Blu-ray Folder
BlueStreak > New Job > Choose folder created in step 1
BlueStreak > Export As Disc Image
BlueStreak > Open Source Disc > Select file made in step 3
BlueStreak > Burn Disc image
Notes: I tried this on DVD-R media and Sony BD-RE media. When I try to play it on a Insignia TV with a built-in Blu-Ray player I get an “Unknown Format” error.