Autodesk has posted YouTube videos on installing Civil 3D. It covers both Single User Stand-Alone licensed and Network licensed versions of Civil 3D. Links to Installation documenation for Civil 3D 2011 is at the bottom of this post.
Stand-Alone Install of AutoCAD Civil 3d 2010
Network installation of AutoCAD Civil 3D 2010
Installing and Configuring the Autodesk Network License Manager
Autodesk Network Licensing Documentation and Self Help Resources.
This youtube video gives you an overview of installing and configuring the Autodesk network license manager and an explanation of the different server models and how to choose the appropriate model for your environment. I recommend watching this video shown above first before digging into the documentation.
The Installation Guide provides instructions for installing and authorizing your product.
|AutoCAD Civil 3D 2011 Installation Guide (pdf – 1008Kb)|
Autodesk Network Administration Guides
The following documentation describes how to use the Autodesk network administration utilities.
|Autodesk 2011 Licensing Guide (pdf – 450Kb)|
|AutoCAD Civil 3D 2012 Network Administration and Deployment Guide (web page)|
|Autodesk Licensing 2012 Guide (web page)|
|Autodesk CAD Manager Control Utility (pdf – 194Kb)|
|License File Parsing Utility Makes your license file easier to read|
All online documentation for Civil 3D is found HERE.