I have a content type called collection and 2 user roles: role1 and role2. role1 users can create collections. What I want to do is to allow role1 users to indicate whether they want their collection remain private (in which case only logged in users and hence role2 users can see it) or let it remain public, in which case anonymous users can see the content. Each collection is really just a collection of pictures. I am using Drupal 6.