Requirements: 

Viewing Full Scene: very high.

Viewing Parts: high.

 

Video with better quality: 

Vimeo (online)

Windows Media Video (download)

 

Downloads: 

Manhattan demo 

 

Other libraries that can be already instaled on your system. 

DirectX9 June08 or higher 

Visual C++ Redist 2005  

Microsoft .NET framework 2.0