Accessing database outside of a hook

So Help me with this

Drupal node-form render is slow. (with hundreds of terms and Super_Select module).

So I'm thinking do this hack.

in my page.tpl.php I will have

// page.tpl.php
elseif (arg(0)=="node" && arg(1)=="myccktype") { 
  include('page-mycustomccktype.tpl.php');
  return;
}

in page-mycustomccktype.tpl.php I will have a

// page-mycustomccktype.tpl.php
<script>
$(document).ready(function(){
$("#page_content").load("/drupal/themes/garland/page-cckajax.tpl.php");
});
</script>

What I am trying to do is in "page-cckajax.tpl.php" tell to Drupal.
that this page is in node/add/myccktype

So I tried

// "page-cckajax.tpl.php" 
chdir('node/add/myccktype'); // for relative path includes to work
include_once "includes/bootstrap.inc";
drupal_bootstrap(DRUPAL_BOOTSTRAP_DATABASE);
arg(0)=="node";
arg(1)=="add";
arg(2)=="myccktype";
print $content;

or

<?php 
chdir('./../../'); // for relative path includes to work
include "includes/bootstrap.inc";
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

$_SERVER["REQUEST_URI"] = $base_url . '/node/add/myccktype';
$form['form_id']['#value'] == 'myccktype_node_form';
print $form;


or 
include('page-nodeaddmyccktype.tpl.php')

NOT WORKING I tried lot of things

How can I force the path to page-cckajax.tpl.php? (this page will load with AJAX) Every time run index.php

You can see I will let my slow node-form run with ajax.

Or better I will run page-mycustomccktype.tpl.php and behind the scenes I will run "page-cckajax.tpl.php"

I will let my user fill a simple container with title and body and after this using Jquery I will redirect everything to next step, the true form (load from page-cckajax.tpl.php) and finnaly user could fill images and categories. And it is done. Will be amazing.

Two big problems

1) I need tell in page-cckajax.tpl.php the correct path and avoid index.php. like I said
2) I need tell to Drupal that the form from node/myccktype is same from node/add/myccktype or something like that

So

So I would like to know if is possible tell to drupal that 'page-cckajax.tpl.php' is in node/add/myccktype

Is it possible? In other word I am trying pass argument. Where argument is the path. I have two chances one in page-cckajax.tpl.php other in page-nodeaddmyccktype.tpl.php

Because Drupal understand that 'page-cckajax.tpl.php' is in 'node/' directory.

So drupal could print $content. Other chance is create a module and try print theme_mycck but still not working. I dont know but I cant invoke this theme_mycck from my module in 'page-cckajax.tpl.php'.

function theme_mycck($form) {
		$output = drupal_render($form);
		return $output;
}

Regards