Guess I'm a total newb when it comes to RAM, but I have a few questions. 1) I'm going to be getting a 2.26ghz 13" MBP. Will updating the RAM to 4 or 6 GB make a real-life difference in speed and performance? Is it worth the money? I currently have a 2.8Ghz MBP with 4 GB of RAM. Would I notice a big everyday performance between the 2 models? 2) When you buy 4 GB of RAM, does that mean you can add it to the 2 GB of RAM you already have to get 6GB? Not really sure how that works out. Do you have to replace your old RAM first? 3) Is replacing RAM idiot proof? Is there any special thing you need to do like reinstall the OS or configure internal settings? BTW, I'm planning on installing an 80 GB Intel SSD (2nd gen) but I can't seem to find any (even the 1st gen ones are at the old price???), so I guess my main concern is upgrading the RAM worth it?