Time to get a working machine and not a vm running the Windows 8 preview. Given that not all machines that you would want to try out windows 8 on – have a DVD drive then we need the USB option to get up and running. Microsoft have usefully given us a tool from the Window 7 release that can be used to place the iso image on to a USB key. You can get it here.
Install that and run to get the option to transfer the image. There are basically 4 simple steps.
Finally its a matter of checking the bios on the machine that you wish to install windows 8 on that its able to boot from USB.