How to join vob files for dvd burning

I just encoded movie with tutorial divx to dvd but the dvd is only 1:22 minutes long so total size of vob files 3.something gig is there way i can add like music video or something on the remaining space on the dvd if so how can i do this cause i already have music video converted to vob files but if i put it together in on one dvd+r will this interfere with other movie vob files


Try Dvd Lab and pleasse read its help files for further details.