I've just spoken to a helpful user of Easy Save 2, who has provided us with some instructions to make the var/www/html folder accessible in Amazon AWS running Ubuntu so you can place the ES2.php file there.
Hopefully this will be of use to some people who intend on using Easy Save with AWS/Ubuntu.I'm using Amazon AWS services. Running Ubuntu Server 14.04.
By using this on SSH:
sudo chown -R ubuntu /var/www/html
to give root user (ubuntu) permission to write to the html folder
Then using filezilla, connecting to public dns, and using key pair... I transfered the ES2.PHP file over to var/www/html directory
All the best,
Joel