When developer has his own loader class and uses it (for example My_Loader) there is no possibility to use it in Zend_Db_Table and Zend_Db_Table_Rowset to load custom rowset and row classes. Now developer needs to override in extended class WHOLE fetchRow and createRow methods of class Zend_Db_Table_Abstract, and change only one row in this methods for example from: @Zend_Loader::loadClass($this->_rowClass); to: @My_Loader::loadClass($this->_rowClass); Is it possible to have some method setLoaderClass (similar to setRowClass and setRowsetClass)? Or is it possible just to check somehow if registerAutoload class already registered and use already registered loader class?