Symfony2 project inside folder hide web/app.php just with .htaccess

I have help-desk project made using Symfony2 and I would like to host the project inside a folder in my website hiding the "web/app.php" from URL. I can't create a virtual host with apache, so I will need to use .htaccess with RewriteRule and RewriteCond. I'm reading and trying for 2 days without success.

I have the folder 'help' in the root directory of website. Inside this folder I have the Symfony with the folders: app, src, vendor and web. 'web' is the public folder that has the app.php controller that handle the resquests. So with the default .htaccess inside the web folder I can access the help-desk system by: www.example.com/help/web that the controller app.php catch the request and redirect to the route 'login' (www.example.com/help/web/login). I would like to access the system just with the URL: www.example.com/help

The original .htaccess inside web folder is:

<IfModule mod_rewrite.c>
   RewriteEngine On
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteRule ^(.*)$ app.php [QSA,L]
</IfModule>

I've almost get what I need creating a .htacess inside the help folder with:

<IfModule mod_rewrite.c>
   Options +FollowSymlinks
   RewriteEngine On

   RewriteRule ^/suportefloripa/web/app.php - [L]
   RewriteRule ^bundles/(.*)$ /suportefloripa/web/bundles/$1  [QSA,L]
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteRule ^(.*)$ /suportefloripa/web/app.php [QSA,L]
</IfModule>

And deleting the .htaccess inside web folder, so when I try www.example.com/help the URL doen't change and I know that the app.php inside web folder was accessed because of a 'echo' that I wrote in the code.

The result is:

    String test

    Oops! An Error Occurred
    The server returned a "404 Not Found".

    Something is broken. Please e-mail us at [email] and let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.

The 'String test' is a echo that I put inside the app.php (default code from Symfony framework):

<?php

echo "String test";

use Symfony\Component\ClassLoader\ApcClassLoader;
use Symfony\Component\HttpFoundation\Request;

$loader = require_once __DIR__.'/../app/bootstrap.php.cache';

// Use APC for autoloading to improve performance.
// Change 'sf2' to a unique prefix in order to prevent cache key conflicts
// with other applications also using APC.
/*
$loader = new ApcClassLoader('sf2', $loader);
$loader->register(true);
*/

require_once __DIR__.'/../app/AppKernel.php';
//require_once __DIR__.'/../app/AppCache.php';

$kernel = new AppKernel('prod', false);
$kernel->loadClassCache();
//$kernel = new AppCache($kernel);
Request::enableHttpMethodParameterOverride();
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);

I think I am almost there But I don't know what I doing wrong.