I am not sure what I am missing here. I tried several programs like
SmartRipper and Decrypter to pull the VOB files from a DVD. Once I
have those on my hard drive I can use WinDVD to view them and they
look great.

My problem comes when I try to auther my own DVD. I have tryied it
with DVD Quick Builder and VideoPack 5 (which you can import VOB
files) with the following outcome:

I have VOB_1.vob (or whatever)
VOB_2.vob
VOB_3.vob
VOB_4.vob

on my hard drive. When I go into Quick builder or VideoPack they
detect that 1,2,and 4 are VOB files, but tell me #3 is not.

I've tryed another DVD (Moive II, ie. by same maker) and it has 5 vob
files and 1,2,5 work and 3,4 don't????

Can anyone tell me what I am doing wrong? I can view them all fine in
WinDVD so I'm pretty sure they all got decrypted fine, and are good
files, but these programs I am using to author don't think they are
vob files.