When an user write the wrong name or password the Login porlet show a message to the user.
My customer has a requirement to change the default message and add a link to the registration porltet inside of this message, because only registered users with all attributes (defined by the customer) can login on the portal.
1 – Stop Websphere Portal
2 – Clear the wp_profile\temp and wp_profile\ws_temp
3 – Go to wp_profile\installedApps\<cellName>\PA_Login_Portlet_App.ear\login.war\WEB-INF\jsp
4 – Change the StatusMessageInclude.jspf adding what you want.
Restart Websphere Portal.
Obs: If you apply fixes or fixpacks maybe you need to change it again.