Интересная задача по .htaccess

RewriteEngine On
RewriteRule ^papka/(.*)$ /nastroika/index.php?id=$1 [L]

$msg = $_REQUEST['id'];
$domain = $_SERVER['SERVER_NAME'];

$ch = curl_init();
$url_string = 'http://SAIT-B/ . $domain . '/' . $msg;
curl_setopt ($ch, CURLOPT_URL, $url_string);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
$html = curl_exec ($ch);
curl_close($ch);

if (strstr($msg, ".css")){
@header('Content-Type: text/css; charset=windows-1251');
}
elseif (strstr($msg, ".png")){
@header('Content-Type: image/png');
}
elseif (strstr($msg, ".jpg") || strstr($msg, ".jpeg")){
@header('Content-Type: image/jpeg');
}
elseif (strstr($msg, ".gif")){
@header('Content-Type: image/gif');
}
else {
@header('Content-Type: text/html; charset=windows-1251');
}
echo $html;