I teach a film class and I need to be able to pull a 2-3 minute scene off a DVD and show it to my class. I need to be able to set that marks that it rips in order to get the exact starting and stopping points I need. So something like handbrake that rips by chapter won't help. Last semester when I did this on my PC I used dvd shrink and then edited together the different scenes and reburned them onto a disk. Now I just want to pull them off and show them through the digital projector on my Macbook. Any help would be greatly appreciated.