Wanted to do a volume level tweak to one part of a homemade DVD from old video tape. 1- Copied a single .vob file , renamed vob file as .mpg , then opened with Studio 9. 2- Increased volume level to one segment of the file. 3- Used "Make Disc" , creating DVD files-compiled from this single .vob file only - on hard-drive. 4- Moved the newly created single .vob file to original DVD's video_ts folder , renaming it to replace file used in step 1 (saving original .vob) 5- The DVD files would play , but DVDShrink would not accespt the new, volume adjusted vob file. ( I use 'Shrink as a proofreader of sorts, to let me know if files will be accepted by burning appl. 6- Ran old DVD files along with new edited .vob thru "VOBBlanker". The files output by VobBlanker played , and were suitable for DVDShrink. Is it really that easy?? I've read a bunch about demuxing and muxing, etc. , but always seemed too complicated / time consuming.