http://manuals.info.apple.com/en/MacBook_13inch_HardDrive_DIY.pdf So, I found the above pdf guide from apple about replacing the hard disk. Please see the first step of the 'removing the hard drive' section, where you have to loosen the screws. As the area in which to put the screwdriver is small, I could not fit a regular screwdriver. I bought a 90 degree L shaped thing with screws on the end for getting into these places, but cannot find anywhere with either a head for this or something else that can loosen these screws (BTW it says in the guide that you need a Philips 1 screwdriver). I have been to maplin, b&q, PC world and a few small hardware stores. I am in hammersmith, london and would be very grateful if someone could tell me where to get the tools I need, or recommend somewhere not too far away that could replace my hard drive for me. Thanks in advance.