i was trying to backup a dvd ('control room') using DVD Shrink/Nero combination. After I was done compressing, Shrink told me that the <i>compressed</i> disc was too large for the dvd-r. not only that but i was unable to increase the compression using the slider bar in order to make it fit. so i looked around for sections to delete but the extras i felt were necessary to keep. so i of course eliminated the unnecessary audio tracks, about 4 or 5 maybe. but still too big. then i came across four more audio tracks.. i believe they were the 'main' audio tracks and they were all the exact same name and size. i figured why do i need 4 of the same audio track. so since they were the same size, i got rid of 1 or 2 and finally the disc was able to fit and the sound on the disc seems fine to me. has anyone encountered this? why was dvd shrink unable to just compress the movie til it fit? did i only need one of those 4 identical audio files? and if so, is it possible that some dvd's are being released with unnecessary 'filler' files in order to make compressing and burning more difficult? any feedback would be appreciated, thanks!