Adding a custom cache driver

[eluser]Ordos[/eluser]
I created my own cache driver located in application/libraries/Cache/drivers/Cache_xxx.php. But CodeIgniter will not auto-detect this driver. The only way I got the driver to work up till now was to manually edit the 'valid_drivers' inside system/libraries/Cache/Cache.php.

Is there a way to force CodeIgniter to auto-detect this or was this not built in? Maybe a feature for future releases?