Creating new Admin account via terminal

My 10.5.4 ibook G4 has been set up to automatically log me in to my account, becausae i have a problem with forgetting my passwords,

I want to make a new account for my friend, but I am unable to because i do not remember my password, i've searched on google but seem to find no way to do this,

Is there any way to do this without the OS Disk? (I've lost it)

hehe thats a tough one man, if you saved your passwords at all then maybe you can look in the keychain files and see what you have stored