This article has been updated 03/08/2013 – because Microsoft had moved the download page again…..
If you search around the internet, you will find all sorts of tools and tips for how to install Windows 8 (or Windows 7) without a DVD drive – but I prefer to stick with the tool from the folk who created Windows 8 – presuming that they must know something about how to do it ….
Just go to the “Microsoft Store” here:
and download Microsoft’s handy Windows 7 USB/DVD Download tool.
The Microsoft Windows 7 USB/DVD Download tool Tool will create a bootable USB memory stick containing everything you need to install Windows 8 (or Windows 7) from either a downloaded ISO or DVD.
Really useful stuff that I bump into..... 
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