All the documentation regarding running Wowza Streaming Engine on AWS is available here.
There are no particular instructions on running Wowza in AWS VPC, but if you have any issues with your setup, you can open a ticket with our Support team and we will try to have your issues sorted out. To open a support ticket, please send an email to support@wowza.com, describe the issues you are experiencing and provide a ZIP archive containing your Wowza configuration and log files.