Please Help - Need to log in as administrator for user account

[Olds]

I need to be able to log in as an administrator on a
users account to make changes in internet accessibility
and content ratings. I haven't figured out how to do this
yet. If I go into the user's settings in the content
advisor, and I put in an address, or make a change, it
says I must be logged in as administrator to make the
changes. Also, I would like to make the changes just for
that user, and leave my settings alone. How do I do this?
I have looked through the newsgroups, but no success.

This is the second time I have posted this. Please
respond.

Thanks,

Olds