[live4ever]

I'd like to upgrade to coreboot with this script but I can't seem to get the CN60 Chromebox to boot from USB (ChromiumOS) anymore.

Currently I'm running the SeaBIOS from here:
http://johnlewis.ie/asus-chromebox-owners-rejoice/

and booting a dedicated OpenELEC from the SSD.

Pressing ESC at boot I get the choice of SSD or USB (options 1&2) but it always boots from the hard drive (even if I remove the SSD).
It booted fine before from USB when I installed OpenELEC.

Thanks for all your work Matt.

not sure what you mean by 'it boots from the hard drive even if I remove the SSD' - not sure how that's possible. If you mean the text shows 'booting from hard disk', then that's normal for SeaBIOS - it only distinguishes between hard disk, cdrom, and floppy disk. My custom build is the only one that shows 'booting from USB' for USB devices.

did you try using another USB stick to boot ChromiumOS?

Ok I finally found a USB that would boot ChromiumOS but I am getting a checksum error when downloading the firmware: