You will also have to alter create_account_success.php to keep the registrar from automatically being logged on when the account is created successfully. Replacing the code in create_account_success.php with the following will accomplish that:
<? include('includes/application_top.php'); ?>
//header('Location: ' . tep_href_link(FILENAME_DEFAULT, '', 'NONSSL'));
/*<? $include_file = DIR_WS_INCLUDES . 'application_bottom.php'; include(DIR_WS_INCLUDES . 'include_once.php'); ?>
<meta HTTP-EQUIV="Refresh" CONTENT="0; URL=http://www.yourdomain.com/catalog/revised_success_page.php">
This destroys the logged session (logs them off after automatically logging them on) and redirects them to a custom made success page.