How to configure LDAP in websphere portal?

See the links:

http://www.ibm.com/developerworks/websphere/zones/portal/proddoc/portalldap/

http://www-10.lotus.com/ldd/portalwiki.nsf/dx/configure-websphere-portal-v6.1-with-ldap-over-ssl

http://publib.boulder.ibm.com/infocenter/wpdoc/v510/index.jsp?topic=/com.ibm.wp.ent.doc/wpf/cfg_ldap.html

http://www-10.lotus.com/ldd/portalwiki.nsf/dx/MultipleRealms.pdf/$file/MultipleRealms.pdf