Knightmoved

Thanks for the excellent guide. My question is : I have a video performance that uses the Vob, Ifo and Bup files that I would like to burn to DVD. However the video originally came from 2 DVDs and exceeds the free space in the information box by -3,747,545,088 bytes and calculates at 180%. How can I divide these files so that I can burn them onto 2 DVDs? Thank you.