2.20 Installation Help!

Hello, I recently downloaded and trying to install the No Source version of NopCommerce 2.20. I previously was using 1.7 and had purchased the 1.7 documentation guide. I also purchased the 2.2 guide that is pretty similar to 1.7. I downloaded the no source so I would not have to run it from VS2010 every time. I am hoping to use 2.2 as I like the backend interface and has more features. I extracted the files and folders to my C:\inetpub\wwwroot\folder and I was looking for an install folder as the documentation says to load www.yourstore.com/install/, but there is no install folder to load. Any step by step instructions you can provide would be most appreciated. Thanks!

There's no install folder. It's not required due to internal working of ASP.NET MVC. Just copy the content of the "no source" package to the server and open the site URL. You'll be redirected to the installation page.

Please also watch this screencast (from 8:53). It contains a process of uploading and installation.

I have followed the exact steps, but I receive 500 internal errors when access www.smaillisnewbig.com. I follow arvixe's suggestions to try to get detailed trace, but could not make it.
Any hint?
Thanks,
Chen