Deploying site on Amazon Beantalk and IIS settings

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http://serverfault.com – I am interested in working with Amazon Elastic Beantalk to deploy my new site. A few things that I need to know and can't get an answer to: 1) How can I maintain IIS settings of all deployed and future deployed machines? 2) If I can maintain, what happens if I change the settings on one server, will it automatically set it on other servers? 3) How can I backup the data. In other servers I usually make an AMI and deploy to a new server in case of a problem? (HowTos)