Running Windows 8 Developer Preview from USB

I followed this tutorial on how to run it from USB:

http://www.borncity.com/blog/2011/09/21/creating-windows-8-to-go-on-a-16-gb-usb-stick/

No need for me to write it again, except that i couldn't get it to work with the last dos command..

bcdboot.exe f:\windows /s f: /f ALL

I deleted the /f ALL, so now it looks like this:

bcdboot.exe f:\windows /s f: /

Now my Intel Atom 320 computer is preparing the settings, or what ever it is doing.. takes quite some time..

Ps. it only 77 min to prepare the bootable usb from a basic Intel Core I3 processor with 4gb ram (x64 bit windows 8 dev preview OS)