I never could do what you try to do. I also have lots of vob files on CDs, by collections like "gracia" or Sams3d" but I use them differently and don't try anymore to put them in my library. I just introduce the CD when needed and select the file from there. As the files have names, I just need to click on it and it will show up a small preview. But if I try to put it in the library, Vue goes so extremely slow to search the files from the CD that I gave up.