OK, after you setup your forum boards and add content to them, then you can proceed.
now go to your ezblock manager
Admin >Ezportal>Ezblocks> then scroll down the page until you get to the settings for the Center> click on the link marked Add ezblock> then select the type block you want to place in the center>
example: Board News> Now click on Add Block button > then you'll find various options and setting for the board news block.
I used the key board "Ctrl" key holding it down while, selecting the categories from the forum I'd like to display, if you only want one category the just select it, from the list.
You can select the number of posts to add also! 1 -10 for example.
The welcome post can be edited and changed to what ever you like or, you may start and new one first!
From the list at the bottom you may select who may view the center block! then Click on the add block button once again!