I ordered an Hitatchi 320GB 7200RPM hard drive for my MacBook Pro. Arrived today, and I've just got round to installing it. I've pretty much wrecked the screw that holds the plastic retainer to stop the hard drive falling out - used the correct screw driver, little pressure and it was in so tight that I've destroyed it. Anyway, I got it out and there is still some catch on it so I can put it back in loosely. Now onto my actual problem - my new hard drive didn't come with any mounting screws. I have no idea what screw driver or alan key to use. The smallest alan key I have won't fit. I'm gutted - fact that I've shredded the retainer screw and that I can't get the mounting screws out. solved.