Could aspnet_regsql.exe can be used to create a DB capable of storing multiple email addresses

Q 1

A) Is there a way to create a membership database (using the aspnet_regsql tool) where each user could provide multiple email addresses (not just one) during the registration process?

B) Is there a way to somehow "inform" the security wizard in the WAT to include a new input field (where additional email addresses will be entered) when creating a new user account?

thank