I'm kinda behind on these things but I'm trying to move VOB files that I've downloaded off torrent sites to DVD Decrypter to burn. It won't recognize these files. Do I need to turn them into a different file and if so how do I do that? Thanks for any help.

You also need .bups and .ifos to go with your .vobs.

Throw those all into a VIDEO_TS folder and you burn that to the DVD.

Use Nero.

http://www.doom9.org/index.html?/mpg/ifoedit-basic.htm

This would be the more difficult route. I'm sure someone else will post an easier method to burn your stuff shortly.