Karthik,
With this much information you will be clear to people at you only. I could understand that you want some customised requirement in the Reference Object Block of the Notification type. And every possibility that you can not achieve this through standard.
Case1
If you have the data you want to have in the above fields in some other objects and you want to put them here in one field by joining 2 such fields etc etc, you have write your logic in user-exit QQMA0007, which can bring the values you want there by default. so your ABAPer has to develop a logic in this exit to retrieve the information from fields of other tables and concatenate into one field and equalte it to the Notification fields (of Reference Object block).
Case2
I opine you should have a Custom screen area such as Reference Object Block which can be developed through the user-exit already you've visited i.e., QQMA0001. Giving you a picture of such customised block (screen area).
At the end, I'd like to suggest to you, you should be very clear through pictures wherever possible to make readers understand without effort. Even you should edit pictures and post to show your end result.
KJogeswaraRao