[sv1cec]

I am not sure I am 100% correct, but I did this for a script I have and which I didn't want to update the lastactivity or the lastvisit:

In sessions.php find:

if (!SESSION_BYPASS)
	{
		if (TIMENOW - $bbuserinfo['lastactivity'] > $vboptions['cookietimeout'])
		{ // see if session has 'expired' and if new post indicators need resetting
			$DB_site->shutdown_query("
				UPDATE " . TABLE_PREFIX . "user
				SET lastvisit = lastactivity,
				lastactivity = " . TIMENOW . "
				WHERE userid = $bbuserinfo[userid]
			", 'lastvisit');
			$bbuserinfo['lastvisit'] = $bbuserinfo['lastactivity'];
		}
		else
		{

Replace this with :

	if (!SESSION_BYPASS)
	{
		if (TIMENOW - $bbuserinfo['lastactivity'] > $vboptions['cookietimeout'])
		{ // see if session has 'expired' and if new post indicators need resetting
				if (THIS_SCRIPT != 'yourscriptname')
				{
			$DB_site->shutdown_query("
				UPDATE " . TABLE_PREFIX . "user
				SET lastvisit = lastactivity,
				lastactivity = " . TIMENOW . "
				WHERE userid = $bbuserinfo[userid]
			", 'lastvisit');
			$bbuserinfo['lastvisit'] = $bbuserinfo['lastactivity'];
				}
		}
		else
		{

Notice this line in the replacing code:

if (THIS_SCRIPT != 'yourscriptname')

This is where you enter the name of your php script. Also make sure that at the top of your script, there is a line like:

[code]define('THIS_SCRIPT', 'yourscriptname');

Mind you I am using vB 3.0.xx so the code may be different if you are using a later version.