Magento: Add upload field to contact form

<?php
$URL="http://dl.panticz.de/magento/contact_attachment/form.phtml.diff";
echo "wget -q $URL -O - | patch -p2 \
/var/www/app/design/frontend/default/default/template/contacts/form.phtml";
echo "

";
$c = curl_init();
curl_setopt($c, CURLOPT_URL, $URL);
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
echo htmlspecialchars(curl_exec($c));
curl_close($c);
echo "

";
?>

<?php
$URL="http://dl.panticz.de/magento/contact_attachment/IndexController.php.diff";
echo "wget -q $URL -O - | patch -p2 \
/var/www/app/code/core/Mage/Contacts/controllers/IndexController.php";
echo "

";
$c = curl_init();
curl_setopt($c, CURLOPT_URL, $URL);
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
echo htmlspecialchars(curl_exec($c));
curl_close($c);
echo "

";
?>

<?php
$URL="http://dl.panticz.de/magento/contact_attachment/Mage_Contacts.csv.diff";
echo "wget -q $URL -O - | patch -p2 \
/var/www/app/locale/de_DE/Mage_Contacts.csv";
echo "

";
$c = curl_init();
curl_setopt($c, CURLOPT_URL, $URL);
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
echo htmlspecialchars(curl_exec($c));
curl_close($c);
echo "

";
?>

Links
http://www.blog.magepsycho.com/adding-upload-field-in-contact-form-and-send-as-attachment/
http://www.magentocommerce.com/boards/viewthread/440759/