How to get the CreateUserWizard to email using the DisplayName instead of From email address?

Hi,

I'm trying to work out how to get the CreateUserWizard to email using the DisplayName (or equivalent) so that the recipient sees a name (e.g. Ben Miller) instead of an email address in the From field of their email client.  In my CreateUserWizard control I have tried putting a name (e.g Ben Miller) in like this:

    <asp:CreateUserWizard...>
    <MailDefinition BodyFileName="~/BodyFile.txt"
            Subject="Welcome new User" From="user@domain.com, Ben Miller">
    </MailDefinition>
    ...
    </asp:CreateUserWizard>

I have also tried using the web.config file, but neither of these seem to use the DisplayName

    <mailSettings>
      <smtp from="user@domain.com, ...