[coreboot] Is it possible to flash coreboot with proprietary vendor tools?

[Iru Cai]

Hi,

Can I use proprietary vendor tools like winflash or a vendor BIOS
update disk to flash coreboot? I don't think it possible but I can't
find a reason to explain, or it may be possible if I modify the ROM
format to fit those tools.

Iru Cai