[Eosian]

Create a plugin on newthread_post_complete

PHP Code:


if ( in_array( $foruminfo['forumid'], Array( 1 /* Set any forum ids you want this to apply to here */ ) ) )
{
    $posterid = 3; // Set your bot ID here.
    $posttitle = 'Welcome Aboard!'; // Set your reply title here.
    $template_name = 'auto_greet_template'; // create or use your own.

    $templater = vB_Template::create($template_name);
        $templater->register_page_templates();
/* Add any variables you want the template to have */
        $templater->register('username', $vbulletin->userinfo['username']);
        $templater->register('forumname', $vbulletin->options['bbtitle'] );
    $postmessage = $templater->render();



    $dataman =& datamanager_init('Post', $vbulletin, ERRTYPE_STANDARD, 'threadpost');
    $dataman->set_info('thread', $newpost);
    $dataman->set_info('forum', $foruminfo);
    $dataman->set_info('is_automated', true); 
    $dataman->set('threadid', $newpost['threadid']);
    $dataman->set('userid', $posterid);
    $dataman->set('allowsmilie', false);
    $dataman->set('visible', true);
    $dataman->set('title', $posttitle);
  $dataman->set('ipaddress', '127.0.0.1'); 
    $dataman->set('pagetext', $postmessage);

    $postid = $dataman->save();
    unset($dataman);
} 


You can easily modify this to work on several forums with different templates, or to work on all forums to automatically add a second post of some sort, such as an advertisement post.

My sample template looks like this;

Welcome to {vb:raw forumname}, {vb:raw username}!