Case Tracker module

Hello to all of you who will spend few minutes to read this post.

To make long story short, the situation is as follows...

On our firm production site (which is offcourse a Drupal powered site), i installed Case Tracker module.The module works fine, ie. i add a project, then a case for that project.I also "call" the cases with insert_view-6.x-1.0 module by piping the apropriate syntax [view:name of view] in order to post a link wherever i want.That is all working great.

My real problem starts here:

- how can i add comments to existing cases.I worked with a few bugtracking apps (BugTracker.Net, BugZilla...), so i am wondering how to enable the comment posting for a particular case;

- is there an option to allow only specified users to view/edit specific cases?

In general, i'm stuck with the bacsic Case Tracker funcionality, like on this demo site => http://drupal6casetracker.beta-web.co.uk

If there is anyone who installed this module, i would appreciate pointing me in the right direction.

I want to achieve the funcionalitiy of a customer loging in, making a case for his project, an posting comments for that case.

Drupal version involved is drupal-6.13.

Thx in advance for the time and any help, regards,

Dag