Do not put a certificate in the last box..You shold only have the bios, SLIC, and SLP if you want..Mod the bios. The certificate is not needed or advised at this point (or ever!!!) SSv3 is the best mod for this board if I read correctly..is it an MSI board??
I have just downloaded the bios (It is MSI) and used tool v1.29 and it generates the modified bios sucessfully. The tool defaults to the 0 + 2 method. The tool shown in your post is v1.27 Tried SSv3 method and this also worked. I can only suggest you download the bios file and tool and try again.
any "unknown" bios defaults to 0+2..If you are unsure of your bios, I would suggest to use the defaults, or ISA. In this case..SSv3 is going to work best.. This from experience..