The Block Administration Page give you full control over the side blocks.
Block Type: Lets you choose between block types (many are linked to the functionality of MPN.)
The first links you see allow you to sort your blocks by Display All Blocks, Only Left Blocks, or Only Right Blocks.
The grid below this displays information on the blocks your site already has set.
Note: If you are new to MPN, your first step in here would be to turn the blocks you do not want invisible. That way they won't be displayed on your page, but you can always go back and see how they were configured.