Can I install Adobe Photoshop Elements again?

I bought adobe photoshop elements, and premier elements 9 together a while ago. I installed both of them on my computer probably half of a year ago, until my computer broke about a month ago. I really want to use photoshop over the summer, because summer is when I usually do most of my photography. Except i'm only borrowing a computer now, and I read that you can only legally install it 2 times. This is a problem because I am buying a macbook pro sometime after the summer, and I would want to install photoshop on it. Does that mean I can install it on the computer I borrowed, and my future computer, because the first computer it was installed on died? Legally it would only be used on two computers, and I would uninstall it on the borrowed computer anyways.