Install Windows 8 from USB drive

Microsoft’s Windows 7 USB/DVD Download Tool can be used to prepare a USB drive with the Windows 8 setup.


The complete guide is available here.
Microsoft’s Windows 7 USB/DVD Download Tool is available @ CodePlex

Dual Booting Windows 7 and Windows 8

Lifehacker has a good article on dual booting Windows 7 and Windows 8. Check it out here