I bought a PowerBook G4 second hand. The seller did a new install of Leopard but I can not figure out how to get the main account to change to my name and my password. I have wandered every where in the Apple site and on this site to figure out how to make this computer "mine" with my name and password not a secondary account. Usually there is some type of "set up assistant" to help but none appears. Can anyone help me?