I bought 2 of Buffalo’s DDR2 RAM online last week for my MacbookPro and I got them yesterday.
Here is showing how to upgrade your Macbook or MacbookPro.
It took only 3 minutes to detach old ones and install new memory but I had to get 00 screw to open the computer and it won’t come with normal tool set so you have to make sure that you have tiny size screw before get started.
Now, my MacbookPro has 4GB of memory. All programs that I have installed runs super fast!! (note: larger capacity of main memory does not make fast speed of processing )

