I recently stopped at the store to see what the problem was with my disk drive and i was told that my disk drive is failing i bought my white macbook in 11/2008 and didnt purchase the extended warranty badtimes but the guy from said it would cost $250 for a new disk drive. Is it possible to buy the disk drive from somewhere else and install it my self??? Im just curious if its cheaper to do it myself or have apple do it.... Your thoughts. Thanks!