Time before being forwarded

Hi,

I'm installing the "Advanced Guestbook 2.4.2".
Does anyone know how i can change the time that takes care of the redirection?
When you sign the guestbook, you get a succes page or a error page.
This page is being showed for a couple of seconds, sometimes to short to read the text on that page.
Is it possible to make this page show a bit longer?
And if so, where do i need to adjust it?

Thanks already!
Kind regards,
fvd

templates/success.php or possibly success_header.php I can't remember precisely. The refresh is done in the meta tag.