No one is trying to patronize you tumshie. Dvd-video consists of .vob, .ifo and .bup files contained within a Video_TS folder. All dvd video looks like this, regardless of which movie you examine.
You didn't tell us what program you used to convert from avi to dvd. Some programs that do this conversion only put the video into a .vob file, which is not enough by itself to burn to a disk and have it play as dvd-video. You also have to author the video, in other words, make the ifo and bup files that are necessary for navigation in the dvd.
If you don't have a Video_TS folder with these necessary files, then you will have to use a program to author your existing .vob file into a full dvd format. You can do this with free tools, like AVStoDVD or FAVC. You can also do this with NeroVision.
Edit: RichMan beat me to posting, but essentially the same message.