Hi all. I'm new to the forums. I thought I'd drop in and ask for your opinions with your macs. I recently purchased a PB and I am going on a trip soon, so I was wondering which options I should go with to save energy while watching DVDs on plane (it'll be sort of long flight from San Diego to Chicago) such as dimmed screen without shutting down hd or display? Longest Battery Power or how should I tweak it? I'm bringing extra battery in case. I wish you all happy holidays.