So I have this old iBook from school they are throwing away, but I want to wipe it so I can use it. I can't log on to it, as I need to be into the school network; it just comes up to the login window with Username and Password. So doing anything within finder is a nono. Startup holding down C--no worky, they must have stopped that from happening. Holding down option at startup results in it going to a big padlock with a bar for a password and an arrow. I don't have the password. I have 10.5 install DVD, and old iMac G5 panther install DVDs, but these are useless I would imagine. Challenge: wipe the mac. Get me to be able to use it as normal. Do I have to buy a new HD? Thanks MacRumors. Tom.