Programmatically Create Pages/Posts in WordPress. Personally modified to work properly. Source: http://advent.squareonemd.co.uk/programmatically-create-a-wordpress-page-post-or-custom-post-type/

gistfile1.php

<?php
// Helper Functions

/**
 * Programmatically creates a WordPress post based on the incoming parameters.
 *
 * Note: This function may need some additional work if you're dealing with non-English languages.
 *
 * @param	string	$title		The title of the page as presented to the users
 * @param	string	$slug		The slug used to access the page via the URL
 * @param	string	$post_type	The type of post to create. Can be either 'page' or 'post'
 * @param	string	$template	The template to apply to the page.
 * @return	int			The ID of the page that was created. -1 if the page already exists.
 */
function bdaily_create_post( $title, $slug, $post_type, $template = null, $parent = null ) {

	$page_id = -1;

	// If a post doesn't already exist with the specified title, create it
	//if( null == bdaily_get_permalink_by_title( $slug, $post_type ) ) {
	if( null == get_page_by_title( $title ) ) {

		$page_id = wp_insert_post(
			array(
				'comment_status' =>	'open',
				'ping_status'    =>	'open',
				'post_author'    =>	1,			// Administrator
				'post_title'     =>	$title,
				'post_name'      =>	strtolower( $slug ),
				'post_status'    =>	'publish',
				'post_type'      =>	strtolower( $post_type ),
				'post_parent'    => 0
			)
		);

		if( null != $template ) {
			update_post_meta( get_the_ID(), '_wp_page_template', $template );
		}

	}

	return $page_id;

}

Hey there,
Can you please mention the hook name to call this function on?