Mark the fields read only in your field settings like normal, and then conditionally disable it with this function. Include readonly='administrator' in your [formidable] shortcode, and use this example to process it.

add_action('formidable_shortcode_atts', 'frm_admin_readonly', 20, 2);
function frm_admin_readonly( $atts, $all_atts ) {
  if ( $atts['readonly'] == 'administrator' ) {
    global $frm_vars;
    if ( current_user_can('administrator') ) {
      $frm_vars['readonly'] = 'disabled';
    } else {
      $frm_vars['readonly'] = false;
    }
  }
}

If you have the same form published in multiple locations and you want to have different styles, you can use this example. When publishing the form, use the shortcode: Please select a valid form Replace "formidable-style-7" with the style name, which you can find for the particular style under Formidable > Styles next to the "Style Name".

add_action( 'formidable_shortcode_atts', 'maybe_change_style_class', 10, 2 );
function maybe_change_style_class( $shortcode_atts, $atts ) {
	if ( isset( $atts['form_style'] ) ) {
		global $frm_atts;
		$frm_atts['switch_style'] = $atts['form_style'];
		add_filter( 'frm_add_form_style_class', 'change_style_class', 20 );
	}
}

function change_style_class( $class ) {
	global $frm_atts;

	if ( isset( $frm_atts['switch_style'] ) ) {
		$new_class = $frm_atts['switch_style'];
	  	$class = 'with_frm_style frm_style_' . $new_class;
	  	
		//reset for other forms
		unset( $frm_atts['switch_style'] );
		remove_filter( 'frm_add_form_style_class', 'change_style_class', 20 );
	}
	return $class;
}