http://www.ntcompatible.com/news/story/how_to_bypass_product_key_while_installing_windows_8.html
How to bypass product key while installing Windows 8
Posted by Philipp Esselbach on: 08/22/2012
Windows Valley posted a tip about bypass the product key wizard while performing a Windows 8 installation
Microsoft has released Windows 8 to MSDN/TechNet subscribers and few other channels starting from August 15th. Few weeks ago; I got lucky to lay hands on it and I noticed that Windows 8 doesn’t allow keyless installation, like Windows 7, by default.
But after doing some R&D I have found a way to bypass the product key wizard while performing the installation. And in this article, you’ll learn how to suppress product key prompt while installing Windows 8.
Note: The following method is effective, legal, and does not requires a lot of technical expertise.