A skinr include.

skins.inc.php

<?php

/**
 * Implements hook_skinr_info().
 *
 * Define the API version of skin(s). This is required when creating a new skin.
 * The theme or module version
 *
 * The "hook" prefix is substituted with the name of the module or theme that
 * implements it, e.g. THEMENAME_PLUGINNAME_skinr_info(), or
 * MODULENAME_PLUGINNAME_skinr_info().
 */
function skinr_provided_skin_skinr_info() {
  return array(
    'skinr api' => '2.0',
  );
}

/**
 * Implements hook_skinr_groups().
 *
 * Optional. Defines group(s) that will contain skins. Groups are form element
 * containers used to organize skins categorically.
 *
 * Each group name must be unique and should be prefixed by the theme or module
 * name implementing it.
 *
 * If you do not define a group, your skins will appear in Skinr's default
 * group, which is labeled "General."
 *
 * The "hook" prefix is substituted with the name of the module or theme that
 * implements it, e.g. THEMENAME_PLUGINNAME_skinr_groups(), or
 * MODULENAME_PLUGINNAME_skinr_groups().
 */
function skinr_provided_skin_skinr_groups() {
  $groups['skinr_provided_skin_group_a'] = array(
    '#title' => t('Box Styles'),
    '#description' => t('Choose one or more styles to apply to this element. Click <a href="@help">here</a> for help.', array('@help', 'admin/advanced_help/zen_boxes')),
    // Meta information about the skin to display to administrators.
    '#admin_title' => t('Zen Boxes'),
    '#admin_description' => t('Contains 2 skins to manipulate the background and font size of the container it\'s applied to.'),
    // Skinr provided defaults.
    '#weight' => NULL,
    );
  );

  return $groups;
}

/**
 * Implements hook_skinr_skins().
 *
 * Required.
 *
 * The "hook" prefix is substituted with the name of the module or theme that
 * implements it, e.g. THEMENAME_PLUGINNAME_skinr_skins(), or
 * MODULENAME_PLUGINNAME_skinr_skins().
 */
function skinr_provided_skin_skinr_skins() {
  $skins['skinr_provided_skin_background_color'] = array(
    '#title' => t('Text color'), // Default is ''.
    '#description' => t('Description of a skin'),
    '#type' => 'select', // Default is "checkboxes".
    '#group' => 'zen_boxes', // Default is ''.
    '#weight' => NULL, // Form API weight, per group
    '#screenshot' => 'screenshot.png', // This path is relative to the path of this file

    '#features' => array (
      'block',
      'panels_display',
      'panels_pane',
      'panels_panel',
      'views_view',
    ),
    '#stylesheets' => array(
      array(
        'css/provided_skin.css', // This path is relative to the path of this file
        array('type' => 'file', 'group' => CSS_DEFAULT, 'media' => 'all', 'browsers' => array('IE' => 'gte IE 8')), // These options are passed to drupal_add_css()
      ), 
      'css/provided_skin_two.css', // No additional options required
    ),
    '#scripts' => array(
      'js/provided_skin.js', // This path is relative to the path of this file; no additional options required
      array(
        'js/provided_skin_two.js', // This path is relative to the path of this file
        array('type' => 'file', 'scope' => 'footer', 'group' => JS_DEFAULT, 'defer' => TRUE), // These options are passed to drupal_add_js()
      ),
    ),
    '#templates' => array(
      'skinr_provided_skin_background_color.tpl.php', // This path is relative to the path of this file
    ),
    '#options' => array (
      'boxes-bw' => array (
        '#label' => t('Black on white'),
        '#class' => 'boxes-bw',
        '#stylesheets' => array(
          'all' => array('css/provided_skin.css'), // This path is relative to the path of this file
        ),
        '#scripts' => array(
          'js/provided_skin.js', // This path is relative to the path of this file
        ),
      ),
      'boxes-wb' => array (
        '#label' => t('White on black'),
        '#class' => 'boxes-wb',
      ),
    ),
    '#default_status' => 0,

    // The options below are programatically added.
    '#status' => array( // Overrides #default_status on a per theme basis
      'bartik' => 1,
      'fusion' => 1,
    ),
    '#source' => array( // The implementing module or theme
      '#type' => 'theme', // Options: module | theme
      '#name' => 'zen', // The name of the module or theme
      '#plugin' => 'boxes',
    ),
  );

  return $skins;
}

/**
 * Implements hook_skinr_skins_alter().
 *
 * @param $skins
 *  An array containing skins and their properties.
 */
function skinr_provided_skin_skinr_skins_alter($skins) {
  unset($skins['skinr_provided_skin_background_color']['#features']['panels_pane']);
}

/**
 * Implements hook_skinr_groups_alter().
 *
 * @param $groups
 *  An array containing groups and their properties.
 */
function skinr_provided_skin_skinr_groups_alter($groups) {
  $groups['skinr_provided_skin_group_a']['#weight'] = 10;
}