1) Open index.php
Add:
require_once ENGINE_DIR.'/modules/files/files-comm.php';

2)Open index.php
Find:
$tpl->set('{topnews}',$topnews);

Add:
$tpl->set('{filescomm}',$filescomm);

3) Open engine/init.php
Add:
require_once ENGINE_DIR.'/modules/files/files-comm.php';

4) Open /main.tpl
Add :
{filescomm}

=======================================
Open index.php :
=======================================

Find :

$tpl->load_template('main.tpl');


Add After :

require_once ROOT_DIR.'/engine/modules/files/topfiles.php';
$tpl->set('{topfiles}',$topfiles);

=======================================
Open main.tpl
Add your block :

{topfiles}

=======================================

İf You don't See Changeble :

Delete

engine/modules/top_downloads_files.tmp

=======================================

1. Upload Files in Upload Folder :      for install        folder
==================================================
2. Open index.php:

Find
  require_once ROOT_DIR.'/engine/init.php';
Add After:
  require_once ROOT_DIR.'/engine/modules/catlist.php';

Find
  $tpl->load_template('main.tpl');
Add After:
  $tpl->set('{catlist}', $catlist);
=====================================================
3. Open main.tpl:
Find
  {headers}
Add After:
  <link rel="StyleSheet" href="{THEME}/css/dtree.css" type="text/css" />
  <script type="text/javascript" src="{THEME}/css/dtree.js"></script>
Put Your Block :

<div class="dtree">
<center><a href="java script: d.openAll();">Open All</a> | <a href="java script: d.closeAll();">Close All</a></center>
<br>
<script type="text/javascript">
<!--
d = new dTree('d','{THEME}/img_cat/');
d.add(0,-1,'Files Categories');
{catlist}
document.write(d);
//-->
</script>
</div>

==========================================
Open engine/modules/catlist.php
==========================================
Find :
$link=$config['http_home_url'].'index.php?do=files&op=cat&id='.$row['id'];

Replace it :
$link=$config['http_home_url'].'files/cat/'.$row['id'].'.html';

Open : index.php
Find :
require_once ROOT_DIR.'/engine/init.php';
Add After :
include ROOT_DIR.'/engine/modules/filesinfo.php';
Find :
$tpl->result['vote']);
Add After :
$tpl->set('{filesinfo}',$filesinfo);
Put This Code on main.tpl
{filesinfo}

Open : index.php
Find :
require_once ROOT_DIR.'/engine/init.php';
Add After :
include ROOT_DIR.'/engine/modules/siteinfo.php';
Find :
$tpl->result['vote']);
Add After :
$tpl->set('{siteinfo}',$Siteinfo);
Put This Code on main.tpl
{siteinfo}