Hello everyone; On apple website, there are 2 types of RAM. One is 1 GB x1 stick, other is 2GB (2 sticks.) How am I going to upgrade to 3 GBs then? Computer only has 2 slots. I did a forum search, and found out that "Crucial" RAMs are good for macbook pro but they also don't seem to have a single stick 2GB ram. Thanks for replies in advance.