Guest Account

I am just trying to setup a good file sharing method with
XP Pro. I would like it so that if one person in my
company logs onto my computer they see one folder and if
its another person they see another folder. It seems as
if XP Pro is close to how it works on 2000 Server, but
for some reason when I disable the guest account hoping
that the user will then be forced to enter a username and
password it just prompts them for the guest password.

Does anyone know how to change it so that when someone
logs into the XP Pro computer when the guest account is
disabled they can enter a different user name and
password instead of guest?