The sticker showing the belt routing is very important. If you don't have one then either take a picture or draw it out.
On these engines I find it easier to remove the air intake hose from the air filter to the throttle body for more access to the belt.
One hint is to install the new belt over the A/C pulley first. You have to put it through in between the idler and tensioner pulleys and then around the A/C pulley.