Groups vs Shares???

[GreenCare]

We have a small office with one proposed directory for general use and I am proposing another directory for Mgmt use. The mgmt directory will have 2 users. The general directory will have everyone. I guess I am asking for some advice in concept on how this should be configured for now and into the future as this expands.
I have the users setup. Then I setup a couple of groups, then setup the shares. When I look at the smb.cnf file it seems to be duplicated under groups and and shares. Confused what should be the right way to do this.
Do I place the users iin a group and then name the group's directory at this point?
Or do I create a share and then add users to the access control of the share??
What is the proper thought process???
Also, what is the difference between read/write vs administer???
Really close now. Thanks.
Tom

[Javier Amor Garcia]

Hi,
 in the 'edit group' section there is a control to create a share for the group (the control don't shows itself when file sharing is not enabled), you can use it to create a share usable for the group members.