Anyone got a way to update cart items options, not just quantity?

[eluser]bloodylyons[/eluser]
Been looking around for a way to update an option on my cart items but cant seems to find anything!

the update function only updates the quantity, i've looked into modifying it
but no joy, wondered if anyone has got this to work before? or knows of any extended library i can take a look at.

cheers

[eluser]Konfine[/eluser]

Code:

<?php

class MY_Cart extends CI_Cart
{
  function __construct()
  {
      parent::CI_Cart();
  }

  function update_all($items = array())
  {
      // Was any cart data passed?
      if ( ! is_array($items) OR count($items) == 0)
      {
          return false;
      }

      // You can either update a single product using a one-dimensional array,
      // or multiple products using a multi-dimensional one.  The way we
      // determine the array type is by looking for a required array key named "rowid".
      // If it's not found we assume it's a multi-dimensional array
      if (isset($items['rowid']))
      {
          $this->_update_item($items);
      }
      else
      {
          foreach($items as $item)
          {
              $this->_update_item($item);
          }
      }

      $this->_save_cart();
  }

  /*
   * Function: _update_item
   * Param: Array with a rowid and information about the item to be updated
   *             such as qty, name, price, custom fields.
   */
  function _update_item($item)
  {
      foreach($item as $key => $value)
      {
          //don't allow them to change the rowid
          if($key == 'rowid')
          {
              continue;
          }
          //do some processing if qty is
          //updated since it has strict requirements
          if($key == "qty")
          {
              // Prep the quantity
              $item['qty'] = preg_replace('/([^0-9])/i', '', $item['qty']);
              // Is the quantity a number?
              if ( ! is_numeric($item['qty']))
              {
                  continue;
              }
              // Is the new quantity different than what is already saved in the cart?
              // If it's the same there's nothing to do
              if ($this->_cart_contents[$item['rowid']]['qty'] == $item['qty'])
              {
                  continue;
              }
              // Is the quantity zero?  If so we will remove the item from the cart.
              // If the quantity is greater than zero we are updating
              if ($item['qty'] == 0)
              {
                  unset($this->_cart_contents[$item['rowid']]);
                  continue;
              }
          }
          $this->_cart_contents[$item['rowid']][$key] = $value;
      }
  }
}

[eluser]bloodylyons[/eluser]
Cheers Konfine,
i already managed to hack the core library, which i know is inadvisable... but i will extend it with my own MY_cart for sure