Cannot overload cache drivers (memcached)

[eluser]CoderBoy[/eluser]
Hum I cannot seem to find a way to overload the Driver.php file

I was going to use similar logic to what has been used in

system/core/Loader.php

to get if it is a driver extension request or not.

Code:

$subclass = APPPATH.'libraries/'.$subdir.config_item('subclass_prefix').$class.EXT;

            // Is this a class extension request?
            if (file_exists($subclass))
            {
                $baseclass = BASEPATH.'libraries/'.ucfirst($class).EXT;

                if ( ! file_exists($baseclass))
                {
                    log_message('error', "Unable to load the requested class: ".$class);
                    show_error("Unable to load the requested class: ".$class);
                }

Going to implement what I am after another way for the time being.

I have a global helper class, going to have to put the function in there to prefix my cache keys and crawl though my code changing all occurrences.