I am thinking of upgrading my Macbook 2.16 core 2 duo to 4GB of memory. However, the guys at Micro center told me my Macbook won't recognize it. I'm not sure if this is true or if they just want me to buy another Mac. Anyway, has anyone done this? Also, Will Lion run on 2GB of memory? I only intend to run Xcode. Anyone try this? thanks!