Add widget more than once

I find out an alternative way to add the widget more than once. For example, this is the code to add the widget once:

// The widget to show the mini calendar
function widget_init_events_calendar() {
  // Check for required functions
  if (!function_exists('wp_register_sidebar_widget'))
    return;

function widget_events_calendar($args) {
    extract($args);
    $the_title = stripslashes(get_option('events_calendar_widget_title'));
    $the_cats = stripslashes(get_option('events_calendar_widget_cats'));
    $widget_title = empty($the_title) ? __('Calendar','calendar') : $the_title;
    $the_events = minical($the_cats);
    if ($the_events != '') {
      echo $before_widget;
      echo $before_title . $widget_title . $after_title;
      echo $the_events;
      echo $after_widget;
    }
}

function widget_events_calendar_control() {
    $widget_title = stripslashes(get_option('events_calendar_widget_title'));
    $widget_cats = stripslashes(get_option('events_calendar_widget_cats'));
    if (isset($_POST['events_calendar_widget_title']) || isset($_POST['events_calendar_widget_cats'])) {
      update_option('events_calendar_widget_title',strip_tags($_POST['events_calendar_widget_title']));
      update_option('events_calendar_widget_cats',strip_tags($_POST['events_calendar_widget_cats']));
    }
    ?>
    <p>
       <label for="events_calendar_widget_title"><?php _e('Title','calendar'); ?>:<br />
       <input class="widefat" type="text" id="events_calendar_widget_title" name="events_calendar_widget_title" value="<?php echo $widget_title; ?>"/></label>
       <label for="events_calendar_widget_cats"><?php _e('Comma separated category id list','calendar'); ?>:<br />
       <input class="widefat" type="text" id="events_calendar_widget_cats" name="events_calendar_widget_cats" value="<?php echo $widget_cats; ?>"/></label>
    </p>
    <?php
  }

//this widget can only be used once in exactly 1 of the sidebars
  wp_register_sidebar_widget('events_calendar',__('Calendar  Events HomePage','calendar'),'widget_events_calendar',array('description'=>'A calendar of your events in the HomePage.'));
  wp_register_widget_control('events_calendar','events_calendar','widget_events_calendar_control');
}

So what you have to do is to reapeat the same code but changing the name of the functions and the name that is in the wp_register_sidebar_widget and wp_register_widget_control, for example:

// The widget to show todays events in the sidebar
function widget_init_calendar_today() {
  // Check for required functions
  if (!function_exists('wp_register_sidebar_widget'))
    return;

  function widget_calendar_today($args) {
    extract($args);
    $the_title = stripslashes(get_option('events_calendar_widget_title'));
    $the_cats = stripslashes(get_option('events_calendar_widget_cats'));
    $widget_title = empty($the_title) ? __('Calendar','calendar') : $the_title;
    $the_events = minical($the_cats);
    if ($the_events != '') {
      echo $before_widget;
      echo $before_title . $widget_title . $after_title;
      echo $the_events;
      echo $after_widget;
    }
  }

  function widget_calendar_today_control() {
    $widget_title = stripslashes(get_option('events_calendar_widget_title'));
    $widget_cats = stripslashes(get_option('events_calendar_widget_cats'));
    if (isset($_POST['events_calendar_widget_title']) || isset($_POST['events_calendar_widget_cats'])) {
      update_option('events_calendar_widget_title',strip_tags($_POST['events_calendar_widget_title']));
      update_option('events_calendar_widget_cats',strip_tags($_POST['events_calendar_widget_cats']));
    }
    ?>
    <p>
       <label for="events_calendar_widget_title"><?php _e('Title','calendar'); ?>:<br />
       <input class="widefat" type="text" id="events_calendar_widget_title" name="events_calendar_widget_title" value="<?php echo $widget_title; ?>"/></label>
       <label for="events_calendar_widget_cats"><?php _e('Comma separated category id list','calendar'); ?>:<br />
       <input class="widefat" type="text" id="events_calendar_widget_cats" name="events_calendar_widget_cats" value="<?php echo $widget_cats; ?>"/></label>
    </p>
    <?php
  }

  wp_register_sidebar_widget('todays_events_calendar',__('Calendar  Events Main','calendar'),'widget_calendar_today',array('description'=>'A list of your events today'));
  wp_register_widget_control('todays_events_calendar','todays_events_calendar','widget_calendar_today_control');
  }

This is not the best way to do things, but it works. I expeact the next realease of plugin cames with multiple widget.