I believe this project will benefit from the following format of delivery.
A presentation for the overview of AWS
Each service, what it does and business benefit.
Detailed explanation of EC2 and a demo for creation of an instance.
Accessing AWS (Console, API, SSH)
Steps involved in the migration of XEN VPS to EC2.
Walk through of migration.
If I have understood your exact requirement, basically you are asking for a tutorial based instructions, preferably in lab set up. However because EC2 uses other services, an overview is required.
Thanks
KS.