Use PGCDemux (freeware) to get the celltimes from my version (for the exact chapter points).
Use Muxman (freeware) to author a movie only DVD including the celltimes for the chapters. Use your video and your audio track.
Now you have a movie only DVD of RTJ with the chapters at the right point.
Now use Vobblanker (freeware), load in my DVD and replace the movie with your movie only DVD.
This will get you your DL NTSC version with the new audio but using all the already existing menus that look pretty similar to JDs.
Just an offer to spare you some time.
The compatibility problem with my SL version is because there are two files in the video_TS folder that shouldn't be there (I am really sorry about that). If I find the time I will re-upload a version that works for all players. Right now you will have to remove these two bmp files from the folder and it will work great.