Nowdays, almost evereyone is installing Windows 7. I already forgot the days of windos XP, even if I still have some applications that I need to emulate them to work under Windows 7. Sure, you may tell me about windows 8, but in my opinion is to soon to put the new version in a production enviroment.
So, for those like me, I made a short video tutorial about how to make a bootable usb drive to install windows 7 from it. I recorded this tutorial using a windows7 image, but you can make in the same way, any bootable image you want, no matter if it's windows XP, Windows 7, Windows 8, Mac OS, Linux or other bootable CD/DVD.