For some time now I have always struggled to find a definite and foolproof way of making a USB stick bootable. Here are a couple of foolproof ways.
The first way is to use a tool such as DAEMON TOOLS to mount an ‘iso’ image to a virtual drive. Once that has been mounted, open a command prompt and type:
xcopy D:\*.* E: /s/e/f
(Where d: is the virtual drive letter and e: is the USB stick)
The only disadvantage of this method, is that it requires that the ISO image in question have bootable files integrated into it. If you were trying to create a bootable image from an ISO image that doesn’t have an bootable files; it will likely fail.
The second enjoyable way i have found is to use a file called ‘unetbootin-windows-377.exe’, which can be found in sourceforge. This is simply a matter of giving the program the ISO file and then telling it what drive
letter your USB stick has been assigned, and then letting the program do its own thing.
*Edit: This method isn’t quite so enjoyable, as i found that the USB stick is booted using the “Moblin” Linux Distro startup. This isn;t quite so useful, so my advice would be to use the ‘xcopy’ idea above.