File permissions in folder

[Hagforce]

Hi

I have set up a terminal server at work, with Ubuntu 10.04LTS and Free NX terminal server.

All works great, over all expectations.

But I have some file permission problems.
In the home folder I have mad a folder where files that all users should have full access to is put.
The problem is that when a user puts a file there, only that user have full access to that file, other users only have read rights.

How can I make it so that all files put in this folder have full rights for members in the group "staff"?