I bought the new 13" MBP and I'm selling my Late 2007 15" MBP to cover the cost. I will be formatting the hard drive so that my account and info on the computer are erased. My question is, how can I erase my account on the system so that whenever the new owner gets it, he/she gets the Leopard start up screen (The one like when you purchase a new Mac and you have to setup your account i.e. the "welcome" screen)? Sorry if I'm not being clear but I hope you get what I'm aiming for Thanks!