Install Windows 7 from a USB drive
WinUSB Maker is a tool that converts any USB drive into a start up disk for Windows 7 and Windows 8.
The process is really simple: first execute WinUSB Maker, next you must decide if you want to make the start disk from the configuration folder or from an ISO image, then select the device where you want to save it and begin the process. It's that simple.
WinUSB Maker does not need to be installed, it supports devices of up to 1TB and works wonderfully well. The perfect solution for your start up disks.