so, i just picked up this late '08 macbook pro. it's the 2.8ghz 15" model. it already had 4gb of ram in it, which speeds along pretty well. i wanted to upgrade to 8gb, so i ordered corsair 2 x 4gb kit. i installed the new ram and it booted up. i check about this mac and it says 8gb ram. well, a few minutes later firefox is open and the computer freezes. so, i restart and it starts the apple screen, then goes to blue screen and stays that way. i thought maybe the ram wasn't seated properly, so i reseated it and tried that process a few times, even once trying one new 4gb stick with my previous 2gb stick to see if 6gb would work. it didn't. same blue screen. i put my 2 sticks of original ram back in and it's working fine again. any idea what might be the problem? any help would be great. thanks!