Inside registerview.php, you could change public function index() to this (assuming it is unedited):
PHP Code:
public function index(){
$mysidia = Registry::get("mysidia");
$document = $this->document;
if($mysidia->input->post("submit")){
$document->setTitle($this->lang->success_title);
$document->addLangvar($this->lang->success.$mysidia->input->post("username").$this->lang->success2);
$document->add(new Comment("<meta http-equiv='refresh' content='1;url=YOURURL' />"));
return;
}
I think changing the '1' to a higher number changes the amount of seconds before the redirect happens, just in case you want to show a message or something first.