The general process is as follows:set up a TFTP server on another computer connected to your LAN/wireless network host an image of the proper Omega firmware on the computer from http://repo.onion.io/omega/images/ connect the Omega in question to your LAN with the Ethernet Expansion point the Omega to the TFTP server via your computer's IP and the image file name to flash it
This is the rough idea of how it will go, and we are still working on the documentation for it. We will be looking into this more this week.
well I got the tftp server set up with the image. having a hard time pointing the omega to the server ..