Secondly, to be honest, starting off with ripping DVDs and editing VOBs isn't a great place to start. You might want to get some edting expertise with AVI's first, since most DVD editing programs will work with these. You should also create an account at Videohelp.com, and use their search feature for specifuc questions. There's this thread in particular: Star Wars Conversions-Hit me with your best shot..
If you have any specific questions, myself and many others here would be happy to answer them.
