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Prerequisites:
- A USB Drive (4 GB or more)
- Windows Vista, Server 2008 or 7 ISO image or DVD
- Host OS: Windows Vista (SP1 or SP2), Server 2008 or 7

How to Use:
Once you meet the requirements, run the utility. Simply run it and check the option "I have read and accepted the following License Agreement". Now click on OK button and it'll launch the main application.

It also shows a Help window so that you can use the utility easily. The utility requires only 4 easy steps to follow:
Check USB drive (To check whether your USB drive is attached or not)
Format USB drive
Choose DVD or ISO image (To copy the required files to USB drive)
Start the process to create bootable USB drive

Home Page - http://www.askvg.com/a-bootable-usb-utility-to-create-bootable-usb-drive-to-install-windows-vista-server-2008-and-7/