To setup a new overview you must create the follow thinks in Enterprise Manager.
1. create a new list on the case table with the column that the users should see.
2. create a new window under the SDM module using the module Overview
3. create a folder under the window just create using the Module Search Data view. Add the list create in step 1 to the folder and also set list type and search options (see the standard overview ServiceDeskOverview)
4. add the folder the windows Tab list
5. Create a new menu item to open the new overview window. check the security settings to ensure that the right pob users have access to it.
6. open the new window using the menu item and set the filter for the list and save it for all the users.
You can use the ServiceDeskOverview window under SDM – windows as inspiration to setting it up.