i'm having trouble with this also
there is a tutorial here:
http://forum.imgburn.com/index.php?showtopic=4643
that explains the process, but i get the error
i have a vob and ifo in a video_ts folder that i got there using dvd decrypter
there is no BUP file
i tried burning with just udp, but the disc did not work
i tried changing the .vob to a .iso but that doesnt seem to have worked either