possible to mod hp pavilion G6-1245SD with f.6a?

Hi

Is it possible to remove the whitelist from the bios of a Hp pavilion G6-1245SD with bios version F.6A?

it has bios sp62234.exe.

I know it is RSA signed , so is it possible to downgrade of can someone mod the bios?

Sorry but i see i posted it in the wrong section. my mistake!