Sub contact groups in shared contacts.

Hello. I am trying to set up shared contacts in outlook 2010 for our whole 'Technology' department. This is a combination of different sub departments.
So Far I have created the account which hosts the shared contacts, and gave the relevant permissions to add the shared contacts folder to the selected users.
To further organise this I would like to have each subset of the technology departments groups in separate contact lists.
I would like our end users just to add one group which will then contain the sub groups and not add each sub group in individually.
I have attached two pictures which will show what im trying to do. One is something I edited in mspaint.
Thanks in advanced.


This is what I currently have. This is what I would like.
Attachment 16113 Attachment 16114