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Single Sign-On means something else to different people - e.g. one-time authentication and authorization across multiple systems (front or back-end) or simply being able to delegate credentials from the system you are logged-on to other systems while accessing a services or data. In SharePoint 2010 for Authentication you could either configure Kerberos ...

SharePoint does not perform authentication. What you are trying to do is not possible. The page you reference is for configuring SharePoint web applications. Microsoft's single sign-on approach is based on ADFS2.0. I recommend you deploy ADFS and configure SharePoint and your other application to both delegate authentication to it.