external access to BaseHref

Hello everyone,

I search a possibility to change the BaseHref not over the fckconfig.js.
like this in fckeditor_php5.php:

$this->InstanceName   = $instanceName ;
$this->BasePath      = '/fckeditor/' ;
$this->Width      = '100%' ;
$this->Height      = '200' ;
$this->ToolbarSet                      = 'Default' ;
$this->Value      = '' ;
$this->BaseHref      = 'http://www.xyz.de' ;