Black Swirl of the Dead

[Gromber]

Hi, with the new multibios mod, i could remplace the original bios with a dreamshell bios flashed? could i run region changer and try to rewrite flashrom?
or there are a bios that doesnt need flashrom info and i can use in retail dreamcast.

(what name of bios i should use in both case?) (I could use sd if necessary)

I have other dreamcast but i want to repare this dreamcast.

Thanks for all!