Add asp file extension

Hi, I have a virtual dedicated server (IIS) with ASP installed. I would like to make pages with .exe extention to serve as regular .asp pages. So when a visitor will go into: [login to view URL] instead of simplly download the software, the "mysoftware.exe" will redirect him to another page. I will give you an access to the server where you can make this change, in addition i would like you give me a short step by step guide of how i can do it my self in the future Thanks Yaron