Include a custom menu in page.tpl (from http://drupal.stackexchange.com/questions/65616/how-to-include-a-custom-menu-in-page-tpl)

Include a custom menu.php

<?php
 $menu = menu_navigation_links('menu-your-custom-menu-name');
 print theme('links__menu_your_custom_menu_name', array('links' => $menu));
?>

menu_preprocess_function.php

function THEME_preprocess_page(&$vars) {

$menu = menu_navigation_links('menu-your-custom-menu-name');

$vars['custom_menu'] = theme('links__menu_your_custom_menu_name', array('links' => $menu));

}