I need a module that will allow the following

- post documents
- modify documents and repost
- post html
- post images inlined, like in html
- security to allow certain groups to post to certain areas
- if a user is not allowed to post to an area they can't see the menu item for the area.

This needs to be like a forum with groups being able to add areas and upload documents.

Is there anything like this. I have tried to use wf-snippets but there is no securiry with it. This would actually work with a security piece and upload/download ability.

Any ideas from anyone.. I could even use multiple modules if there are some that would create what I need.