Say you need to cut a few minutes in the middle of a VOB.

How do you do it without demuxing?

I would like to keep it in VOB format as that would cut
Video, Audio and Subtitles at the same point.

And I need to be able to cut down to the exact I-frame too.

Or what about going in and edit some Jump off points in the vob files?
The part will still be there but will not show up during playback.