password-reset from admin

Hi!

I′m using WP as a CMS for an event and i′m now trying to make a list of all users in which i add a button at the end of each row, where i can reset (and re-send) the user-password. If i can′t get around this, i would have to reset every user with entering his/here e-mail adress into the lostpassword-form on wp-login.php.

I looked through the function in wp-login.php but i can′t get around this. Could someone push me a little further and explain me how i would trigger those functions? Here goes the code from wp-login.php incl. line-nr.

216  /**
 217   * Handles resetting the user's password.
 218   *
 219   * @uses $wpdb WordPress Database object
 220   *
 221   * @param string $key Hash to validate sending user's password
 222   * @return bool|WP_Error
 223   */
 224  function reset_password($key, $login) {
 225      global $wpdb;
 226
 227      $key = preg_replace('/[^a-z0-9]/i', '', $key);
 228
 229      if ( empty( $key ) || !is_string( $key ) )
 230          return new WP_Error('invalid_key', __('Invalid key'));
 231
 232      if ( empty($login) || !is_string($login) )
 233          return new WP_Error('invalid_key', __('Invalid key'));
 234
 235      $user = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->users WHERE user_activation_key = %s AND user_login = %s", $key, $login));
 236      if ( empty( $user ) )
 237          return new WP_Error('invalid_key', __('Invalid key'));
 238
 239      // Generate something random for a password...
 240      $new_pass = wp_generate_password();
 241
 242      do_action('password_reset', $user, $new_pass);
 243
 244      wp_set_password($new_pass, $user->ID);
 245      update_user_option($user->ID, 'default_password_nag', true, true); //Set up the Password change nag.
 246      $message  = sprintf(__('Username: %s'), $user->user_login) . "\r\n";
 247      $message .= sprintf(__('Password: %s'), $new_pass) . "\r\n";
 248      $message .= site_url('wp-login.php', 'login') . "\r\n";
 249
 250      if ( is_multisite() )
 251          $blogname = $GLOBALS['current_site']->site_name;
 252      else
 253          // The blogname option is escaped with esc_html on the way into the database in sanitize_option
 254          // we want to reverse this for the plain text arena of emails.
 255          $blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
 256
 257      $title = sprintf( __('[%s] Your new password'), $blogname );
 258
 259      $title = apply_filters('password_reset_title', $title);
 260      $message = apply_filters('password_reset_message', $message, $new_pass);
 261
 262      if ( $message && !wp_mail($user->user_email, $title, $message) )
 263            wp_die( __('The e-mail could not be sent.') . "<br />\n" . __('Possible reason: your host may have disabled the mail() function...') );
 264
 265      wp_password_change_notification($user);
 266
 267      return true;
 268  }

Thanks A LOT!