YOu can say Yes, or No, it does not matter if you don't intend to run vobblanker after that. If you say yes, AND you run vobblanker after that, the cell will be removed from the VOB. But you don't really need that for an FBI warning, because it's a very small cell usually....
YOu'll be surprised to see how fast you learn PgcEdit, the learning curve isn't just with PgcEdit though, it's with the whole entire DVD structure thing. That takes a while, but in a couple month, you'll be swimming in there like a fish in the ocean!
jeanl