LDAP and Organization Unit

HI There I've had some success in getting LDAP services to address book, I have installed phpladadmin, addressbooktoldap and they work fine to move/edit the entries. However I can only search for entries using thier Name, not thier Company Name. Ideally in Apple Mail or Entourage if a user searched for example they'd get list of all the people at example corp. I am currently using: cn=people,dc=expample,dc=co,dc=uk I believe I have to add an Organization object or maybe an Organizational Unit and then move my address book entries to it then change my search dn. Is there anybody out there how could give a few tips. Steve