I just got around to changing the serpentine or "accessory" belt on my 2010 Corolla S with the 2ZR-FE 1.8L I4 engine a bit early at 50,000 miles. I took pictures of the process and made a DIY tutorial to help out other 10th generation owners.
Here's the page hosted on my travel blog - http://www.paulstravelpictures.com/2009-2013-Toyota-Corolla-Serpentine-Accessory-Belt-Replacement-Guide/index.html
I hope you guys find it to be useful. It seems like there wasn't a really clear guide online for this procedure on the 2ZR-FE engine.