[Dismounted]

No need to use any template conditionals. (The HTML is only put in the custom template.) Just change the plugin.

PHP Code:

if (THIS_SCRIPT == 'yourscript' AND $vbulletin->userinfo['userid'])
{
    $result = $vbulletin->db->query_first("SELECT count FROM mycounter LIMIT 1");
    $mycounter = $result['count'] + 1;
    $vbulletin->db->query_write("UPDATE mycounter SET count = $mycounter");
}