[Zope] Permission with addFile module

Hi, I need for my users to upload files within Zope. I have a copy of addFile and it works when I am superuser. I tried setting permissions through the security tab for the file but the users are prompted for user name and password. These users do not have aacounts within Zope. I do not need this since this is an intranet environment. Can someone point to some documentation that addresses this problem. I googled around and this has been addressed before but the link to those sites did not exist. Thanks. Larry McDonnell