2) Under the "Mode" menu select "IFO"
3) Under the "Input" tab, be sure your main movie (and the appropriate angle, if applicable) is selected.
4) Click the "Stream Processing" tab.
5) Check the "Enable Stream Processing" checkbox
6) Uncheck all the streams you do NOT want.
7) For each stream you DO want, click it so it is highlighted, then check the "Demux" radio button.
8) Click the decrypt button to start coyping your streams.