Windows 7 login buttons

I’ve been asked to configure a Windows 7 laptop as follows:

Setup 3 buttons that are always present

button 1 – user1
button 2 – user2
button 3 – guest

Clicking on one of the buttons would log the user in without having to type any credentials.

A link on the page would be useful to create a new accoung with guest rights as well.

Is this possible? If so, how? If not, why and how close to this configuration can I come?