Here's what i have found from google
Yes you have to compile it from source code
Getting and Building a Chromium-Based OS
1. 1 Prerequisites
2. 2 Get the source
3. 3 Build Chromium OS
4. 4 Make changes
5. 5 More information
Welcome to Chromium OS!
Our goal here is to give you an idea of how to get started.
Note: For all instructions, make sure you download the client into a local directory. Placing the source and compiling on a network partition will drive you nuts.
Note: These build instructions will evolve over time as the build system is improved. Make sure to periodically check back for the latest information.
You need to have Linux. We currently support the following:
* Ubuntu (Hardy 8.04 or newer, Karmic 9.10 recommended)
* An account with root access (needed to run chroot and modify the mount table)
* Chromium prerequisites (needed to build a Chromium-based browser as part of building Chromium OS)
url for windows media player
mms://a830.v167321.c16732.g.vm.akamaist ... GOOGPR.wmv
I also found the google doc shown for google chrome os
But i don't have permission to view