There are a lot of Google search results with guides on how to create bootable USB drives from which you can install Windows. Unfortunately, a lot of them are outdated or missing key pieces of information. Fortunately, I found two pages that were pretty helpful:
Windows 7 USB/DVD Download Tool – Who needs a guide when you can have software do it for you? Microsoft’s online software store has a tool that makes it easy to make a bootable USB drive or DVD from the ISO.
at Kevin’s Blog – Kevin has put together a fairly complete guide to how to make a bootable USB drive. It’s useful even when you use the Microsoft tool because you might end up having to manually run bootsect (e.g., you’re making a x64 installer on a machine running the x86 version, so you can’t actually run bootsect from the x64 ISO).
As I type this, my computer is busily rebooting away during the installation process. I think it’s almost done.