These are just some simple php scripts that will interface with Amazon's Elastic Load Balancer. They are meant to be used as scripts and not actual webpages.
listInstances.php - list all instances in a specified ELB
addInstance.php - add instance to a specified ELB
removeInstance.php - remove instance from a specified ELB
You'll need to download the latest php sdk from aws. You can download it here or install with PEAR: http://pear.amazonwebservices.com/get/aws.phar
You will also need to have a working aws keypair.
listInstances.php <lbname> <region>
addInstance.php <lbname> <region> <instance>
removeInstance.php <lbname> <region> <instance>