I've found a few how-tos, but they're based on old versions of both libraries (and contain references for files that seem to have been removed from OpenAM/OpenSSO) - for example:
I've tried importing the old version of am_remote_opends_schema.ldif, but I get a fairly verbose error:
ldap_modify: Invalid syntax (21) additional info: An error occurred while attempting to decode the object class "( 2.16.840.1.113722.214.171.124 NAME 'iplanet-am-managed-filtered-group' DESC 'Managed Filter Group OC' SUP iplanet-am-managed-group X-ORIGIN 'OpenSSO' )": The definition for objectclass 2.16.840.1.1137126.96.36.199 is invalid because it has an objectclass type of STRUCTURAL but this is incompatible with the objectclass type AUXILIARY for the superior class iplanet-am-managed-group
Should I roll back to the versions of OpenAM and OpenDJ to the older versions of OpenSSO and OpenDS referenced in these how-tos? That seems like a not-so-pleasing approach, but if it would do the trick...