Switch firstname and surname order in public addressbook

[MZa]

Hello,

would it be possible to display "Surname Firstname" in global addressbook. We are reading users from LDAP, so I tried little hack:

surname_field' => 'givenName',
firstname_field' => 'sn'

but then users are sorted by firstname, which is  confusing 
Best regards,
MZa

[MZa]

$config['addressbook_name_listing'] = 2;