I've got a 2GB stick installed and want to max out and add another 2GB. I'm looking to buy at my local CompUSA store. Is this ram ok for my Macbook? I did some homework but want to make sure!!!! http://www.compusa.com/applications/SearchTools/item-details.asp?EdpNo=3281625&sku=P33-5044 M A C - S P E C S : Macbook 2.0 Intel Core Duo 2 | 2.0GHz (Late 2007) Macbook3,1 (from about this Mac) Thanks in advance!