[otrs] OTRS and LDAP

Hi all, I'm trying to authenticate against an OpenLDAP server, using the core.schema, i'm unsure of what to put for uid etc, do I need a specific schema for otrs authentication? (I basically want 3 groups, internal users, agents and customers). Or do I just need to add an additional attribute to the OU? I'm not very experienced at all with ldap, so any pointers will be greatly appreciated. Thanks, Joe Holden Opera Telecom Network Administrator (http://www.operatelecom.com)