RT 4.4.1 Import Users

Can someone tell my how I import users from Active Directory (AD)? When I login I can use my AD log in and password but that is because I am in RT. RT is recognizing my credentials. What I would like to do is bulk import users from AD to RT.

Note: We now have this working.

Use this to authenticate against AD (or other ldap source): RT::Authen::ExternalAuth - RT 4.4.1 Documentation - Best Practical
And this to import your users in RT so they are available for auto-completion or right granting: RT::LDAPImport - RT 4.4.1 Documentation - Best Practical