Installing Windows 7 from a USB Hard Drive

I have a Western Digital Passport External Hard Drive (320GB) that I want to partition to keep the data on, but use some of the free space to install Windows 7 onto my desktop computer. Microsoft has given me the Windows 7 Enterprise Edition ISO to download. I would like to take the External HD and partition it so I can fit the ISO image onto it. How would I go about doing this?

Trying to use GParted to partition the external hard drive has caused a chicken or the egg problem. GParted can't see the drive unless it's mounted, and when it is mounted it will not allow me to do anything to the partition. When it's not mounted, GParted can't see the drive at all and as such can't do anything to the drive.

Once the drive is correctly partition, how do I go about moving the ISO image Microsoft gave me to my USB External Hard Drive? Are there any special steps that I need to take?

I am using Ubuntu 11.04 & GParted 0.7.0, on my Chromebook to do this. Any support would be appreciated.

Answer

If you want to do it all within Ubuntu - install VirtualBox & create a VM for Windows. Install Windows within the VM ( by booting off the downloaded ISO - you can do so using VirtualBox).

Once you have Windows 7 installed in the VM, you can then use the Windows 7 VM to run the Windows 7 USB tool to make Windows 7 bootable from the USB drive.

^{*Yes I know it's too long, but I did this and it worked fine when my DVD drive conked off and I did not have access to a Windows system.}