Integrating Oracle Access Manager with Universal Content Manager

I'm looking for anyone who can pass on any knowledge of using Oracle Access Manager to do single sign on for Universal Content Manager.
I'm setting up the OAM side, but I know little about the UCM side.

Setup

I've got an Apache proxy server that redirects to a weblogic instance hosting UCM.  There's a 10gR3 OAM webgate on the Apache server with a policy to protect the UCM URL.  The policy uses an Integrated Windows Authentication (IWA) authentication scheme so that no login boxes are required at authentication time.  The users' UID is passed into the REMOTE_USERS header variable.  Users and their roles are in an LDAP and their passwords are not replicated into it as these are checked against the Active Directory during IWA.