I have the following Macbook: MacBook 2.0GHz Intel Core 2 Duo (13-inch White) MA700LL/A Laptop/Notebook On the CRUCIAL website i'm told I can upgrade from 1GB of memory to 2GB tops. ...But i'd love 4GB. Anyway to accomplish this or am I stuck at the 2GB limit? I'm asking now as I'm planning on purchasing more memory today. With the Macbook i'm on now, and regards with the Crucial test, I'm told each of the 2 memory slots can hold up to 1GB each, totaling 2GB. Right now I have 512MB in each... So...Can I Get 4GB or just get the 2GB?