using dvdfab platinum (generic Mode)

I want to convert my dvd movies to divx, and i want them about the same size and quality that is in the ones you can get off torrent sites. My question is with all the setting options in dvdfab which to use? there are many in the first options at the top with different sound and so forth. And many in the frame resolution . If you use this program , what do you prefer? A small list of the settings you use please AND Thank you.