As root, run adduser to add a user named guest.
Then enter
passwd guest
guest account.
This should be something easy to remember, like ``guest''.
You will be telling people this password.
Don't make it the same as your own password.
Then make guest's home directory owned by you.
Enter
chown me.mygroup /home/guest
me'' with your regular username and ``mygroup''
with your group name.
(On Red Hat Linux, these will be the same,
since every user has his or her own group.)
You should now exit and do the rest of the steps as yourself, not root.