[HELP NEED]How can ı modding Acer Veriton M4640G windows bios convert to freedos bios ?

ı have the same two piece acer veriton M4640G Windows bios licenced and veriton M4640G free dos bios pc.
i copyed veriton m4640g’s Windows bios flashed to freedos m4640g’s bios but did not open pc.

friend’s question is why did not open free dos pc with Windows bios? and how can ı this?

is it possible Windows bios modding to freedos pc?

can anybody help?