I want to install Lion on my '07 MacBook (Core 2 Duo, 2.0 GHz), but unfortunately, I only have 1 GB of RAM, and I am aware of the 2 GB minimum for installing Lion. But I wanted to know - is this requirement only to install it, or also to run it? Meaning, would it be possible for me to switch memory sticks from another computer that has 2 GB of RAM, install Lion, and then switch back, such that I can continue to use Lion on my computer with only 1 GB of RAM? Now, I understand that most people wouldn't even recommend running Lion on less than 4 GB in the first place, but I'm really asking if it would work regardless. Has anybody tried anything like this? Or do you have any suggestions, recommendations, or warnings about trying this? Might the other computer (already running Lion) be negatively affected by making this temporary switch? I appreciate all your help!