Any good guides? - Authoring DVD after changing audio format

[ijuf]

I recently bought the ac-3 plugin for tmpgenc author.
I loaded up the ISO in it, and re-encoded the original LPCM audio to AC3.

Now what I'm trying to do is to swap(somehow change) the MENU that was made in tmpgenc author with the ORIGINAL MENU(from the ISO). I found a few guides similar to this, but not exactly what i'm looking for.

I'm pretty sure I would have to use Ifoedit or something.
If anyone is kind enough to teach me or give me a link to the guide about this, I would very much appreciate it.

[ijuf]

Another options, I want to know if there's a program that can load up the original DVD, and convert the audio format from 1 another and KEEP THE ORIGINAL MENUS AND EVERYTHING?

Because Tmpgenc Author DELETES the original Menu, and uses the one you make in the program.

[Forum Troll]

If you are trying to backup a retail DVD, you can use VOBBlanker and DVD Shrink to keep the menus and the main audio track.