Flashing nitropad question,

I wondered, how to change X230 from coreboot, libreboot or skulls to nitrokey’s heads bios.

I asked on your github page and was told the best one for that is the full rom.

Which is the 12MB one I think.

What exact command parameters would I use to flash it on my X230 if I were to do this?

flashrom -p internal -w rom

or something else?
Thanks!