I went through many linux forums to see this question unanswered several times. Here's the problem: I'm running Linux Ubuntu 10.04, I downloaded the 90 day Enterprise version of Windows 7(Giving it a try). It is in the form of an ISO. What I want is to make a Bootable Windows 7 USB using the ISO I downloaded. There are several tools out there, but NONE of them allow us to make Bootable Windows USB Sticks 'From/Within Linux'. I'm running out of options as all my computers at home run Linux. Can somebody help me out? (Please don't suggest going to a friend's place, I am very busy)

Format the USB key in NTFS if you have files above 4GB, or FAT32 if not.

Install grub4dos bootloader, or chainload it:

http://diddy.boot-land.net/grub4dos/Grub4dos.htm

http://www.boot-land.net/forums/index.php?showforum=66

Extract contents of the ISO in the USB disk, as they are. Next create a menu entry to chainload bootmgr. That's it.

Or with syslinux:

http://www.boot-land.net/forums/index.php?showtopic=8457

You can install and use any other bootloader which can chainload bootmgr.