extending Auth DB container

I am a new user of pear and wanted to extend the DB container class for Auth to add some of my own function for the user auth. But I note that this part 269 function _factory($driver, $options = "") 270 { 271 $storage_path = "Auth/Container/" . $driver . ".php"; 272 $storage_class = "Auth_Container_" . $driver; 273 274 require_once $storage_path; 275 276 return new $storage_class($options); 277 } default to looking for the driver in the pear directory. Now, I do not have write access to this directory (actually do not want to write to there). If I want to put my own driver file somewhere, what should? I'm pretty new at objects and such, so would appreciate if you could provide some details. TIA Ken