Applications :: Import Mail Account Settings From Thunderbird And / Or Outlook Express Into Mail?

Is there away to import mail account settings from Thunderbird and/or Outlook Express into Mail? [that is mail.app, to help any one searching later on as Mail is too common a word to search for]. I've imported all my messages correctly but don't know how or if it's possible to import my account settings. Also: I'm in the process of migrating all my e-mails / mail accounts / settings and mail rules from Outlook Express to Mail [Mail.app]. I have successfully got all my e-mails across. I have also managed to convert all the e-mail addresses in the 50+ mail rules, as stored in the Windows registry, from hex into text.

Some of my rules have tens of e-mail addresses which if I had to add in each address separately would be a nightmare. Is there away of block adding in e-mail addresses to Mail? Also is it possible to manually edit the mail rules preference file(s) and insert the e-mail addresses into that? I'm aware I have to manually recreate the rules themselves but that's not so difficult. It's the adding back in of all the e-mail addresses that might be, given the large number that exist.