Use this program called WinSetupFromUSB 1 0 beta 7 if you plan to install windows or linux os via usb flash disk.
Why you install os from usb flash disk ? this happen if you pc/notebook not come with cd-rom .
for complete step to use WinSetupFromUSB 1 0 beta 7 you can visit this page
What’s New in This Release:
· fixed issues on some new systems when XP/2000/2003 Setup hangs during text mode
· fixed grub4dos menu.lst entries when detecting the number of hard drives connected
· fixed custom boot menu titles input box when adding multiple similar XP/2000/2003 sources
· grub4dos, included tools and programs updated
· fixed issue with incorrectly detecting if source is Windows 2000
· flushing USB disk write cache is now performed internally, rather than using external programs