im not sure if you have to change the boot sequence or if it will happen automatically, but im pretty sure thats as complicated as its gonna get... it walks you through it, you might need the cd key serial thing too... i dotn know if wiping it clean of antyhign is neccesarry.. it should just erase the previous copy during reinstall unless you tell it to do otherwise....
i would wait to here from mainter, casek, or shai just to be sure though...