I am giving my MBP I got in March of this year to my son and I want to reformat the HD. I assume I put disk 1 in, choose "Erase and Install", the Mac OS Extended and then go to it. I want it to be like the day I got it new. The manual does not mention holding down the "C" key when you boot but I read that in one post. Then when I finish, I go to disk 2??