Hi, Thanks for your comments
I probably be wrong, but I think that lines tells the server to handle .php files as if they were .php5
I am not sure if this is necessary because Magento runs ok with server’s php, I am able to install the store until the pdo_mysql validation.
I read in another post that a workaround for a server without this pdo_mysql library is to install php5 as a CGI with the magento instructions on the KB.
However when I do this I got the 403 Forbidden, You don’t have permission to access /cgi-bin/php5-cgi/index.php/info.php on this server
I am trying the htaccess you posted with no luck :(