Deleting User Account Via Unix

[shonny62]

I have a Mac computer at home that automatically logs in to my daughters user account. Apparently, there is an automatic log-in in her account that has conflicts because whenever the computer is turned on, after the gray apple screen, the screen turns totally blue.

I have tried booting up in safe boot (pressing shift key at startup)and get the following message:

darwin/BSD (Laurens-computer.local) (console)
login:

After typing any login, I get a line for typing password but nothing types in the line of password and I keep getting a fast message of incorrect password and the screen goes back to blue and then back to the same darwin line.

I have an administrator account on this computer and no combination of logins and passwords seem to work.

I have also started the computer with command key + s key and gets into single user mode and is in the root. From there, I do not know how to delete her user account to eliminate the problem as I am not able to get into the computer bypassing her automatic log-in.

Any suggestions on how to fix this problem? I do not have any startup disks for this computer as it was donated as a surplus from the school. It is a G3 operating on Mac OS X and I am not sure if the version is 10.3

[g/re/p]

1. Shut down the computer if it is on.
2. Press the power button to start the computer.
3. Immediately press and hold the Command (Apple)
and the S keys until you see white text appear.

At the prompt, type fsck -yf and press the return key.
Type mount -uw / and press the return key.
Type rm /var/db/.AppleSetupDone and press return.
Type reboot

When the computer restarts, it should act as if you had
just installed OS X for the first time - it will prompt you
for information to set up an administrator level account.