I am not sure what you are attempting to do except install a version to play around with. I hope you are not trying to run an actual site using VM Ware. Outside of that, the fact you are trying to do this using IIS is even more of a headache. The default zip package for UNA is designed for "Unix" type operating systems such as CentOS. So that ffmpeg.exe is not going to work with "Windows", you will need to install the windows version of ffmpeg.exe from the web. You also need to install PHP and MySQL for UNA to work.  

There are a ton of things you will have to do manually before you will be able to do this in Windows. So unless someone has a step-by-step process on how to build a Windows webserver and installing UNA that will run on it, I can only wish you the best of luck. 

You can save yourself by getting a cheap hosting package from the recommended host and installing it there.