Guest access entry icon

My apologies if I am in the wrong newsgroup, but I have searched everywhere
I could think of.

I am trying to help my friend who has Windows XP Media Center Edition,
Version 2002. I can put an icon on the opening page for her as
administrator that is password protected so no one can change her personal
settings. However, I cannot seem to find the way to also put a Guest icon
on the opening page - below her icon - that will allow her family to also
use the computer without going through her icon. (because they inevitably
change her settings to theirs). The help instructions shows it in the list,
tells me it is built in and can't be changed or deleted,. Nevertheless, I
still can't find a way to get it to show on the opening page along with
hers. Can you help? I probably need instructions simpler than the Help
ones. Thank you very much.

If I am in the wrong newsgroup, would you please advise the correct one.
Thank you again for your help.