I'm doing a show with 2 projected movies, both about 20 seconds long. I have a Christie LX45 going DVI into my Macbook Pro using Qlab. My computer recognizes that I have a separate display, but Qlab does not. Do I need an external video card or something to that effect? I've only used Powerpoint and Keynote to do sub/supertitle displays, and those programs are not playing nice with the video. I have Qlab 1 and 2, both with audio licenses. Would renting a video license help me out?