Well, you have to just login into your EC2 instance
machine via Remote Desktop Connection
. This is as same as you connect to any other Windows Server/Machine using Remote Desktop Connection
. I am asuming you know what is Remote Desktop Connection.
Once you connected to your EC2 instance
machine, you can deploy your Asp.Net application in IIS. Again this is as same as you deploy your Asp.Net applications on any other Windows Server/Machine in IIS.
Deploying ASP.NET Websites on IIS 7.0
I worked on Amazon EC2 last year, so not sure if their are any new updates on this. You may have a look at below link to explore more.
For Amazon Relational Database Service (Amazon RDS)
Please post your comments if any issues.