Change MAC address in Sabayon/Gentoo Linux

If, for any reason, you want to change your MAC address in Sabayon/Gentoo Linux, there are two easy way to do it.
Everything is done as root.

Do you want to eat a "piadina romagnola"?

So, why don't you try to make it?
>HERE< you can find my "tutorial"! A real "Piadina Romagnola"