How do I get an ambient occlusion render from maya 2010?

I select the ambient occlusion checkbox in the mental ray features tab but I don't see an ambient occlusion render anyplace?

I want to do an ambient occlusion render and use the result as an overlay to the texture map in photoshop as shown in several tutorials I have seen. They all show the resulting output in photoshop but just ASSUME everyone knows how to get the magical mystical AO render!