Hello Richard. Glad to have you as a fellow DVDFab user! Use the Customize mode to do what you want. Select any audio/subpicture streams that you want to include using the checkboxes in each area. DVDFab will compress all elements the same amount (in this it differs from DVDShrink) and display the relative amount of compression as the "Quality %" in the lower part of the window. With good high bitrate originals, you can go as low as 65% and still get excellent results, but the higher the number the better. You should also find that DVDFab accomplishes this much faster than DVDShrink.