Is it possible to add audio and sub from one DVD to other?

Hi All!

Is it possible to add audio and sub from one DVD to other? I want to add to my dvd audio and subs with other language from other dvd.

Thanks for any useful information.

it is a hell of a job but it can be done with authoring software.
programs like dvdmaestro … i did it a few times . But not enough to remind it and tell it here…sorry