Having problem with installing Craft
It's likely your /craft directory couldn't be found. Out of the box, Craft expects it's /craft directory to be located just outside the root directory of the website. So by the looks of it from your path, your index.php file is located here:

/home/toaeroplano/public_html/


So that would mean you /craft directory should be located here:

/home/toaeroplano/


If I were you I'd put the php.ini settings back to what they were so you get the original error, then make sure you've copied the /craft directory from the installation into the directory above. If you want your /craft directory somewhere else you need to edit the index.php and specify where the directory lives. So edit this line in index.php:

$craftPath = '../craft'; 


The .. in the path just means the directory above, so if you wanted it to live in the /home directory, you change it to this:

$craftPath = '../../craft';


EDIT: Also make sure the permissions on the /craft/app/, craft/config/ and craft/storage/ are set as per the install docs.