1. To edit first admin protection
OPEN root/adm/admin_ug_auth.php
FIND
// Disallow other admins to delete or edit the first admin MOD START
if ( $user_id == '2' && $userdata['user_id'] != '2' )
if ( $user_id == '2' && $userdata['user_id'] != '2' )
REPLACE WITH
// Disallow other admins to delete or edit the first admin MOD START
if ( $user_id != $userdata['user_id'])
if ( $user_id != $userdata['user_id'])
to stop all admins deleting other admins
Warning: Admins cannot edit other admins at all after this is done (such as adding new admins) so have all your admins as admins before.
)