Can't login to Leopard

[G5Unit]

My dad just purchased a MacBook Pro with a Drop in DVD for Leopard. I installed it but now when I want to login, all I get is an "other" login thing with no actual users. I can't login!


How can I fix this?

 

[NAG]

Did you set up any accounts on it before installing 10.5?

 

[G5Unit]

Did you set up any accounts on it before installing 10.5?

Yes. One, but it didn't work when I wanted to login into Leopard.

 

[yellow]

Have you looked on the Apple support website? I believe there's a lot of information covering this issue.