Question Need info on how to add a new thread programatically

<?php defined('_JEXEC') OR defined('_VALID_MOS') OR die( "Direct Access Is Not Allowed" ); /* SETTINGS, PLEASE FILL THESE */ $authorName = $user->username; // OR replace with '$user->name' if you want to use "real name" $catid = 10; // assign the category number of where you want the thread created $msgparent = 0; // add parent id if you want to have one thread for all messages $maxsubject = 35; // Max length of subject $subject = ''; // Inital subject /* END OF SETTINGS */ $db = &JFactory::getDBO(); $db->setQuery("SELECT id FROM #__menu WHERE link='index.php?option=com_kunena' AND published='1'"); $kunenaItemid = $db->loadResult(); if ($kunenaItemid < 1) $kunenaItemid = 0; $kunenaItemid = "&Itemid=" . $kunenaItemid; $user = &JFactory::getUser(); ?> <form action="<?php echo JRoute::_('index.php?option=com_kunena&func=post' . $kunenaItemid); ?>" method="post" name="postform" enctype="multipart/ form-data"> <input type="hidden" name="parentid" value="<?php echo $msgparent;?>" /> <input type="hidden" name="catid" value="<?php echo $catid;?>" /> <input type="hidden" name="action" value="post" /> <input type="hidden" name="contentURL" value="empty" /> <input type="text" name="subject" size="35" class="inputbox" maxlength="$maxsubject" value="<?php echo $subject;?>" /> <textarea class="inputbox" name="message" rows="6" cols="60" style="height: 100px; width: 100%; overflow:auto;"></textarea> <input type="submit" name="submit" value="Submit" /> <input type="reset" name="reset" value = "Reset" /> </form>