[Satcomer]

I was follow the blog MAC OS HELP AND TIPS and cam across a great tip to fix Leopard lost Administrator privileges. THere is first the Apple Document Mac OS X 10.5: Administrator user changes to standard that talks about using the Install disk to reset the master password. However there is a Terminal way also the MAC OS HELP AND TIPS blog came up with:

Shut down the computer if it is on.
-> Press the power button to start the computer.
-> Immediately press and hold the Command (Apple) key and the "s" key for single-user mode.
-> Type "mount -uw /" and press return.
-> Type "passwd" and press return.
-> Enter new password (this will be for the root user account) and press return.
-> Type "reboot" and press return.
-> Enter Account settings and when prompted for administrator account and password, use the user name root and the password you just setup
-> Check box for you standard account to administrate box
-> If all goes well you are admin again.
I will add to this, please DISABLE the root account after you do this, or at very least, use a good, strong password."

I hope you can use either the install disk trick or via this Terminal way.