I took my MBP (one year old) to the Apple Store for a keyboard replacement but after they replaced the keyboard, they discovered another problem. They don't have the parts, it may be several days, I am in the middle of a big project and I am on a deadline. I asked the Genius to remove my hard drive, I brought it home and put it in an USB enclosure. I will be using my neighbor's iMac (also one year old) to work on my project tomorrow using the contents of my hard drive. The project includes photos, video, and music from my hard drive compiled into an imovie that I need to edit a bit before I put it into idvd and burn a DVD. I hope this is not stupid to ask, but I don't have time for mistakes. If I boot on to my hard drive in the enclosure by using Option at startup, will I be working within my hard drive alone, just using the other computer for its processor? I won't leave a trace of my work on their computer, right?