SSO configuration for Portal 7.3 to Sarepoint 2010

Hi Team,

   we required SSO configuration for Portal 7.3 to Sarepoint 2010

  In Sharepoint portal we had 11 .net applications , client wants to use all these applications through portal

  Already SSO is existed for portal and SAP backend applications using "logon " method

  I fetched many of the threads regading my requirement , but didnt get proper way

         Here we are not using any AD , what ever created users in R/3 database same users are created in portal UME

        Domain and usernames are same for portal and Sharepoint 2010

        This Sharepoint is using here as a intranet portal , before the EP portal

        Now the customer wants to access Sharepoint portal through out EP portal

     I want to know initial stage onwards step-by step , read many of the threads not getting proper idea

         want to know from whare need to configuration , guys please share your knowledge it would be great help to me

     It is bit urgent for our customer , please share your ideas.