Hasta La Motion!

I’m in huge need of advice here asap.

In short:
How to edit 90 hours of .vob files (selectively editing snippets) and get them back into .vob files with minimal loss in quality and minimal processor time.

A little longer:
Basically, I have a ton of DVD content that the producers have granted me full access to edit their material, but because of time I can’t edit the lossless source.

Ideally, I’d like to use something very light, such as Quicktime Pro (which I have) to insert in/out points and trim, then re-save. Done. QT does this for mp4 files, but it appears I cannot with mpeg and .vob files.

I would also like to be able to chop out the audio and insert my own.

I have FCP and After Effects, but I can’t afford the render time.

Any advice is much appreciated.

Thanks-
paul