How To: Run Chromium OS from USB Flash drive

1. First download Chromium OS via torrent from here.
2. Then download Image Write for windows from here
3. Unzip the file you downloaded in step 2 and launch Win32DiskImager.exe
4. You will get an error after launching the app. Ignore it.
5. Select chrome_os.img and the drive letter of your USB drive
6. Click on write

source: makeuseof