to create a continuous single vob over 4GB your going to need NTFS for starters. Extract your movie to a single vob via dvdshrink, then use something like womble MPEG video wizard to edit the vob without having to re-encode. The more you change ie filter or crop the original mpeg the longer it will take to write the edited mpeg file. You can also do basic vob editing via Tmpgenc DVD author, load the vob in and go to the chapter/edit screen. Again this will not change the compression or the quality of the mpeg video.