Amazon Web Services - Flash Media Server

Looking for HELP setting up Amazon Web Services account to stream a live rtmp stream through their AWS Flash Media Server . I'm having a challenge setting up DNS for a domain name on the AWS in order to finish tutorial. I can deliver the video stream and will need to try and obtain lowest possible latency from broadcast through internet to screen similar to video conferencing solution. I am familiar with web development, php, mysql, and video broadcasting but need help with Amazon Web Services.