Add OAuth, invites and payments to our Facebook App

Hello, We want to have a simple Facebook php app with these simple features on it: - add an initial dialog (authentication) box to get user's permissions. It needs to be protected against XSS (CSRF) as stated in the example here [login to view URL] - add a second dialog box ( appears after the authentication ) to give the user the ability to invite his friends. A "select all friends" javascript feature should be able to select all of the user's friends before sending the invite button. - add a button on the main app page to make payments with FB credits The application should be optimized for speed and commented The content itself will be added by us. We just need the skeleton