Ok, then I will take a shot as how to frameserve them to Vegas. I am assuming you are asking this help because you can not load them into Vegas and serve them to another instance of Vegas with the frameserver. Is this correct?
If they are the same as a vob then you could use dvd2avi and VFAPI to serve them. DVD2avi will actually directly load a vob file and set up a D2V file that VFAPI can wrap as an AVI. You might have to rename the files to vob. See www.doom9.org or many other places and download dvd2avi 1.76 only and the VFAPI plugin that comes with it. Then go to this thread and downlaod VFAPI 1.05 and the readavs.dll
You will also find installation instructions about a half way down that thread for VFAPI and readavs.dll. Follow them exactly with no deviation please.