The DVD standard says that disks should be written in UDF format. CDBXPP doesn't support this, so, in theory, you can't use it to burn a DVD. However, modern players, particularly the cheap Far-Eastern models, are much more tolerant and will happily play a disk burned by CDBXPP so long as it has the video_ts folder at the top level. For a video DVD the audio_ts folder is always empty and can be ignored (though I usualy include it, just in case).
Ian G.