How to read a DVD with a DVD_RTAV folder?

Hi Folks, A client brought us a stack of DVD-RW discs that they burned on a VCR/DVD combo unit. Unfortunately, they burned them all in VR mode which is not entirely compatible with most stand alone DVD players. Actually these discs aren't compatible with anything else at all. They will play back in the unit that recorded them, but not anywhere else. I have read in some other forums that you can open the DVD_RTAV folder and pull out the .vro file, change the extension to .mpg and be able to use that file to produce a normal dvd. Unfortunately, when I put any of these discs into my Mac, the DVD_RTAV folder shows as being empty. It also has a red circle with a white dash through it. I've tried MPEG StreamClip and several other utilities to try to find the .vro files but nothing sees anything in the folder. I even used Terminal to have the Finder show invisible files, still nothing.

The one thing that did work was to use Toast. It recognized that there were video files on the disc and allowed me to add them to its Media Browser window. From there I was able to add them to a new blank disc image and save the image. The image then mounts as a normal DVD. The only problem is Toast is apparently doing some type of encoding in the background, so it took a very long time to do this, and I'm guessing I lost a bit of quality during the process.

Does anyone have any other suggestions on how to extract the content from these discs in order to make a normal DVD?

Thanks,
Chris