Ask HN: How do you run Chromium OS or simulate a Chromebook in a VM?

We tried many Internet resources to run our own Chromium OS but none of them worked. I can't imagine that setting up your own Chromebook is so difficult and follow the Apple mantra about buying specific hardware instead of running it on a VM.

Do you know how to (quickly) setup your own Chromium OS without buying a Chromebook? How do you test Chromebook Apps?

Thanks, wslh