I would suggest that you post this on the Technical Support board, but this is my best guess:
Go to the Cyrano's page you linked above and right click on his Facebook badge that you want. Click Properties and then highlight and copy the URL. You will need to copy it into your own photobucket or similar type account.
Then you Edit Signature using the bbcode for the badge.
This is where I always forget what to do. You wil have to also add the link to your Facebook page into the code that you are putting into your signature. I can never remember how though. I had it figured out once and then we change versions and I never did get it again. But I know the Tech Board will know. Once you know how it is pretty easy.