Create Bootable USB Flash Drive For Windows 7/Vista/XP Using Koala
The market share of Netbooks is rising. The main problem faced with these machines is the lack of Optical CD/DVD drive. Hence it’s not possible to reinstall Windows by using the installation DVD unless you use an external DVD drive. We recently have shown you how to create a bootable USB flash drive for installing Windows 7 using Microsoft Windows 7 USB/DVD Download Tool.
Koala is another free utility for creating bootable USB Pendrive for Windows7, Windows Vista and Windows XP. The program is standalone, hence no need of installation. The program interface is simple. Just insert the Windows installation disk into your CD/DVD drive, insert the USB flash drive into the USB port and in just few clicks your bootable USB Pendrive gets ready.

It works with Windows 7, Windows Vista, and Windows XP and is available in 6 languages.
You need to have NET Framework 2.0 installed in your PC for running this program.