Need help on SSO of Portal with SAP UCES.

I am trying to find some documents/methodologies to establish single sign on between Utility Customer E-Servive (UCES) and SAP Enterprise Portal 7.0.

UCES is a SAP Provided solution for Utility customers which provides a web front end for customers to check meter reading, intermediate billing, move-ins and move-outs etc. I beleive it also runs on WAS 6.4/7.0 and is Java based.

Just an URL iView is not enough since it would again ask for password.

I have thought of integration approach as with a Java application, but for that I need the loging module code of UCES which is not available.

Did anyone faced similar scenarios? Please help. A detailed explaination would be appreciated.

Thanks.