Well, with some burner apps they will do any necessary conversion for you after you drop the file into the app. But for others it's not so easy. An app like tmgp or something is worthy of having. Visit these sites, they have forums of their own & also have up to date info on which apps to use.
1. http://www.videohelp.com/ 2. http://www.videohelp.com/tools
3. http://forum.dvd-guides.com/