Assuming that you've got a BIOS reflash utility (e.g., WinFlash or etc., that works with *your* device BIOS) and the utility
supports a command line interface, you can always use DUA in HTTP mode to pull updates from a Web Server: http://msdn2.microsoft.com/en-us/library/ms932892.aspx. The update script can launch that command line utility via EXECUTE or
EXECUTEPROCESS command: http://msdn2.microsoft.com/en-us/library/aa460580.aspx.