Yep, you're right. I used Nero express and it sucks. But my copy is ok it seems.
I didn't watch the entire movie but checked chapter by chapter that it worked, and it seems it does.
I noticed the equalisation filter in Nero express for sound remastering makes really poor results compared to the ancient version I have on my good old steam computer. ;)
:) I leave you to your ISO - whatever strange stories !