Thanks a lot for your quick and kind response!
Your comment frightened me :P but felt really nice to read your detailed reply. Yes I've to develop my own block but being a newbie, getting many issues in the development of a simple block. Moreover didn't get any reliable and good support/guideline for developing blocks.
I think block is my exact requirement rather than tool (admin) or something else. If this is the case, can you please guide me in developing a new block?
I tried following the only relevant material in this regard i.e. http://docs.moodle.org/25/en/Blocks_Howto but didn't found it much helping. These guidelines are somehow confusing for me.
Waiting for any kind and quick response!
Thanks again for sharing your knowledge!
M. Adil