create directory 'library', and put 'Zend' directory in it. Your directory structure will look like this: wwwroot application lib Zend public index.php now you should add library to your include path. Edit index.php file: $includePath = array(); $includePath[] = '.'; $includePath[] = './../application'; $includePath[] = './../library'; $includePath[] = get_include_path(); $includePath = implode(PATH_SEPARATOR,$includePath); set_include_path($includePath);