The easiest way to add single LDAP entries is through gq. Start gq on a linux box running X-Windows.
Choose Preferences from the File Menu. Select the Servers Tab and click on the New button. You should have a new window that has 2 tabs with the General tab currently selected. Enter a friendly name in the Name field, this will appear in your gq server list. Enter the address of the LDAP server in the LDAP host field. You should leave the LDAP Port alone. In the Base DN field enter the suffix entry from your slapd.conf file. Next select the Details tab, enter the rootdn entry from the slapd.conf file in the Bind DN field and the rootpw entry in the Bind Password field. Click OK on the New Server window and Click OK on the Preferences window.
The browse mode is the easiest to use. Choose Browse from the Mode menu. You should see the Name of the new server you added. Click on it and it should expand. If you have added the organization and two users as shown in the OpenLDAP configuration section, you should be able to expand the tree control and see all of the entries.