How to create a bootable Windows 7 USB flash drive

Install window 7 from flash USB drive will be more faster than using DVD or CD, This guide will show you other ways to create a USB flash drive that works just like a Windows 7 DVD. In order to follow this guide, you'll need a USB flash drive with at least 4GB of free space and a copy of the Windows 7 installation disc.

http://arstechnica.com/business/news/2009/12/-the-usb-flash-drive.ars