Implement Siteminder Lawson Authentication

I have and older Lawson system that's been retired but we need to keep it in service for a while for reference.  It's basically the portal and the financial components of Lawson.  I don't have the version off hand as I write this, but I can get it.  I'm working on removing LDAP authentication (against Active Directory) in the Apache web server running on Unix and replacing it with Siteminder authentication.  Siteminder is pretty straight forward.

The problem I need to solve is how to remove the Lawson login page and make it go straight to the main Lawson page (the page a user first sees once they have logged in and successfully authenticated).  I'm thinking I need to pull the user info from the http header passed by Siteminder to the main Lawson page (jumping around the Lawson login page) but I'm not sure how to do this.  Any input would be helpful.

Thanks!