Want to open an inbound HTTP other than port # 80 on my AWS medium instance

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http://serverfault.com – I have been able to open port 80 for inbound HTTP traffic on my medium AWS instance running Windows 2008 R2 with IIS 7.5 I want to be able to open another port (say 8000) for inbound HTTP traffic. I'm unable to find a way to do so (at least from the AWS console) (HowTos)