Hi. I need your help. Please help me upgrade my memory in my macbook pro. i have a couple of questions. (by the way, my MBP is the one right before the aluminum one. yung ram ko is 2GB 667Mhz SDRAM DDR2 PC2-5300) 1. Do PCs and Macs have the same RAM? cause when i search for mac memory in newegg.com, the 4GB ram for macs are more expensive than the ones for PC. 2. if im not mistaken. im looking for a 4GB (2 x 2GB) DD2 PC-5300 667mhz memory units right? 3. can the mhz and PC-XXXX variate (e.g. 500mhz or like PC-6000) 4. what do you guys think of this one? http://www.newegg.com/Product/Product.aspx?Item=N82E16820233066 (its a corsair 4gb ram thing) it looks good from the page. mixed reviews tho. hope to hear from you guys soon (for 29.99$ after rebates, it seems like a good deal) Nasa US ako by the way. I really need your opinions!