make a new dvd from a existed dvd + extra files on HD?

[v1p0n3]

hey i need some help. my question is:
i burnt a dvd with a concert that i have filmed and i did it with chapters, nothing else(no menus, it's only a 1 track video). now i wanted to make a copy of this dvd but with a extra file (backstage footage) that i have on my HD in mpeg2 format ready to be authored.
how can i make a new dvd with my mpeg2 file + the existed dvd (keeping the chapters)?
this new dvd that i want to create can have 2 tracks(backstage + concert) or 1 track with chapter, it doesnt matter for me) and menus, i just need a bit help
..anyone?

[andkiich]

Sure, you can do this one of 2 ways depending on the tools you have or are willing to get.

1) Rip the files off the DVD, then demux them into their elementary streams, then re-author the whole thing.

2) Find an authoring program that will work with VOB files directly(TMPGEN DVD Author and DVD-Lab will do this). Import the VOB file and the MPEG extras, author and burn.