I see. The solution is hacking the code to check the repicprocal link to certain url. It should be very easy by modifying /lib/misc.lib.php
Code:
function IsValidReciprocalURL($url, $reciprocal_url) {
global $site_url;
$site_url2 = "http://www.your-other-domain.com";
$p_url = parse_url($url);
$p_reciprocal_url = parse_url($reciprocal_url);
if ($p_url['host'] != $p_reciprocal_url['host']) {
return FALSE;
}
$content = HttpRequest($reciprocal_url);
if (!ereg($site_url2, $content['html'])):
return FALSE;
endif;
return TRUE;
}
We'd be happy to assist you if you have any problems.