Best way to do a basic replacement of audio for DVD burn?

[thatgentleman]

I made my own special audio track that I would like to use to replace the given one on a commercial DVD.

I do NOT care whether I can retain the original menus from the commercial DVD, if I have decent menus at all, or anything special like that - but I absolutely DO want to have the best quality playback possible for the main video track (as close to the quality it plays on the commerical disc as possible) of whose audio I replace. My fantasy is that I burn a new DVD with no loss of the great quality video (smooth framerate, etc) of the commercial DVD only with the completely new audio track.

What's the best way to do this? I appeciate it.

[thatgentleman]

Someone please help with this....I reaaaally need to get this right. Please.