I am sending over a picture of the 2.0/2.4 belt routing.
The tensioner pulley is #8 in the diagram. Please let me know if this all jives with your engine..
Once the belt is removed, then, reinstall #9 pulley and bolt..You can't reinstall it when there is belt tension..
Now, As far as the tensioner goes. Do not remove any bolts. When you put a wrench on the bolt head in the center of the pulley, you should be able to act like you are going to loosen the bolt and the entire pulley will move back to allow you to remove the belt and install the new.
The #8 pulley is attached to a spring loaded tensioner assembly and belt tension is determined by this tensioner..
Please let me know what you find and how everything is going..