Free Tool to Create Bootable USB Drive – Install Windows 7,Windows Server 2008
You will find number of tutorials to create a bootable usb to install Windows 7. If you don’t want to go through the steps of creating a bootable disk, then I’d recommend this free download to create bootable usb to install Windows 7, Windows Server 2008 or Windows Vista ( who cares about Vista anymore 
)
Again like TweakUI this is a portable app, which means it does not require installation! Now that’s a good one I’d say.
The tool is very easy to use and all that is required to create is
- 4GB USB drive,
- ISO image of the OS (Windows 7 / Server 2008/ Vista)
- Host OS can be Windows 7 or Server 2008 or Vista .
In 4 steps your bootable USB is ready
- Check USB drive to see if its connected
- Format USB drive
- Choose DVD or ISO image (To copy the required files to USB drive)
- Start the process to create bootable USB drive
Download Link (Skydrive) | Source
