Someone could show me an example, because I put here in my index.php that way, but I believe it is out of date, with the current version I believe it should be different, because it did not work,
#Instalando raintpl
include "lib/template/raintpl/rain.tpl.class.php"; //aqui é onde está meu arquivo
raintpl::$tpl_dir= $_GET ['r']."/tpl/"; //aqui o caminho da pasta que ficará o template
raintpl::$cache_dir= $_GET ['r']."/tpm/"; // aqui onde armazenará o cache