[Zope] problems with NTUserFolder.

I can't seem to get your product to work the way I want. I'll tell you what I'm after and perhaps you can tell me where I'm going wrong or if indeed your product can do it at all. I have a group of users who are all part of the same domain as I am on. Its the department domain. I want to have these people recognized by my website seemlessly. I know this can be done with NT challenge response if you are using ie as your client. I want to do this in zope such that users who enter the site are automatically authenticated and appriate permissions for them set. These would be zope permission set inside zope, nothing to do with NT permissions. How do I do this?