i'm pretty new to working with mac's but not when it comes to backing up DVD's. Here's the situation, i'm in the military, and one of my buddies and i have come up with this great idea to get and external hard drive and back up our collections on it. i'm going to be the one doing most of the work with it, and what we agreed on was making the movies 2gb files in iso format. i can rip the movie, i can compress the movie, but how do i save as iso? any help is always appriciated including alternatives. thanks.