For searches, to make extended profile view on search display simply change one file:
BxBaseProfileView around line 952 (templates/base/scripts/)
from: $sOutputMode = (isset ($_REQUEST['search_result_mode']) && $_REQUEST['search_result_mode']=='ext') ? 'sim' : 'ext';
to: $sOutputMode = (isset ($_REQUEST['search_result_mode']) && $_REQUEST['search_result_mode']=='sim') ? 'sim' : 'ext';