Pass CRM SSO to a portal iView launched via trans launcher for Channel Mngt

CRM 7.0 looking to launch a role similiar to CHM-PM Partner Manger outside the firewall using web dispatcher. No EP portal in the initial design.

Now requirements have changed where providing portal KM is desired. I can use the trans launcher and call the Iview page in the portal but it does not pass the SSO, meaning the user has to log into the portal to get to the KM site in the main section of the CRM window (not a new url page). We will have the same user id in the CRM abap box and portal, but is there a way to pass the SSO from CRM to the portal? I know this is backwards where portal is usually the leading system. We like the look and feel of the CRM web ui and want it to be the look and feel for the users.

We are looking at note Note 1353456 - How to launch the WebClient UI from the portal, which looks like you would log into the portal then could launch the whole CRM web ui in a separate window. The downside being a separate portal window that for us provides no value to the user.

Would greatly appreciate any thoughts.