*** include/core.inc
--- include/core.inc	2005-10-10 16:28:53.000000000 -0600
***************
*** 12,17 ****
--- 12,26 ----
  
  $FORUM_VERSION = "2.7.2";
  
+ /* virtual support */
+ if ($GLOBALS['SITES_DIR'] and isset($_SERVER['HTTP_HOST'])) {
+ 	$domain = explode('.', $_SERVER['HTTP_HOST']);
+ 	$count = count($domain) - 1;
+ # strip the dot name
+ 	$GLOBALS['FORUM_SITE'] = stripslashes($domain[$count-1] . '.' . $domain[$count]);
+ 	require($GLOBALS['SITES_DIR'].$GLOBALS['FORUM_SITE']);
+ }
+ 
  ignore_user_abort('1');
  set_magic_quotes_runtime(0);