OpenSAML user discussion

Hi,

I am very new to SAML. I recently started to use opensaml to implement 
the Single-Sign-On solution for my company. I need to pass the following data:
 srcUserID, destUserID, userEmailAddr
to the destination website. The SAML POST Profile is preferred.

What is the best place to stick the data in the SAML Response string?

The following is the SAML response string that I am able to use 
SAMLPOSTProfile::prepare() to generate so far:

<Response 
 xmlns="urn:oasis:names:tc:SAML:1.0:protocol" 
 IssueInstant="2004-07-20T05:12:33Z"
 MajorVersion="1"
 MinorVersion="1"
 Recipient="recipient"
 ResponseID="eca7abeb68bbb85b823dc3efb328b9fb"  
xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion"  
xmlns:samlp="urn:oasis:names:tc:SAML:1.0:protocol">
 <Status>
  <StatusCode Value="Success"/>
 </Status>
 <Assertion
  xmlns="urn:oasis:names:tc:SAML:1.0:assertion"
  AssertionID="ad560d7cb628a097d6b30241d166fd10"
  IssueInstant="2004-07-20T05:12:33Z"
  Issuer="issuer"
  MajorVersion="1"
  MinorVersion="1"
  xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion"
  xmlns:samlp="urn:oasis:names:tc:SAML:1.0:protocol">
  <Conditions
   NotBefore="2004-07-20T05:12:33Z"
   NotOnOrAfter="2004-07-20T05:17:33Z"/>
   <AuthenticationStatement
    AuthenticationInstant="2004-07-20T05:12:33Z"
    AuthenticationMethod="urn:oasis:names:tc:SAML:1.0:am:password">
    <Subject>
     <NameIdentifier>name</NameIdentifier>
     <SubjectConfirmation>
      
<ConfirmationMethod>urn:oasis:names:tc:SAML:1.0:cm:bearer</ConfirmationMethod>
     </SubjectConfirmation>
    </Subject>
   </AuthenticationStatement>
 </Assertion>
</Response>


Thanks for your advice,
-James Chen