Good morning- I have a late-2011 13" MBP, ML, 16 GB. I travel a lot for work, and often get trapped in a plane/airport/train station/etc., when I usually bust out a game like Civilization IV to kill the time. I am considering swapping the optical drive for a second HDD. This serves my storage needs fine, but would prevent me from inserting the required CD to run much software. I could lug along an external drive, but the objective here is to carry LESS stuff. Is there a means to perhaps save an image of the CD to avoid carrying the drive and CD along? I'm not even sure what this would be called, so searching for a solution is becoming cumbersome... NOTE: I am NOT asking how to pirate software. I'm referring to fully-licensed retail copies of stuff I own.