How can I edit a Nerovision 4 .nvc file

I have a created a NeroVision project and successfully burned it to DVD. After viewing the DVD, I noticed some things that I would like to change, so I changed them in the original source video and would like to reburn them.

The new source video is exactly the same length of the original. How to I change the .nvc file to point to the new source video so I can still maintain my existing chapter points, menu selections, etc and not have to re-do them?

Trying to open it as a plain text file just reveals unreadable characters.

Again, all I want to change is the source video file, switching video A for video B, but keeping everything else abou the .nvc exactly the same.

Any help would be greatly appreciated.