One more tip

If you will add one yesno setting with var for example
show_debug
and write (in same place - after sessions.php include) in global.php in root vb folder
PHP Code:
if ($vboptions['show_debug'] && in_array($bbuserinfo['userid'], preg_split('#\s*,\s*#s', $superadministrators, -1, PREG_SPLIT_NO_EMPTY)))
{
$debug = 1;
}
You will be able to switch debug info for forums on and off from admin CP