I have a regular 13" Macbook. My hard drive recently failed so I bought a new one. I installed it and now I'm trying to install the software (disc 1 & 2) but I'm still getting the flashing question mark! I tried holding down "C" so it would re-boot from the CD but I get nothing... I tried reseting the PRAM but that doesn't even work. I read somewhere that if you have a master lock on your computer(which I do) then I can't reset the PRAM. I really don't know what to do from this point. Please help! I'm really anxious to get my computer up and running again.