schema with extra theme

I am using extra theme from Elegant themes. It has great features for review posts and inbuilt rating system. But both of this feature is without schema markup. It is highly debated in their forum as well. I want to add schema markup for their inbuilt rating system and review boxes.
How can i go about it? please suggest some methods? This may be a great prospect for you to make this plugin compatible with extra theme as it is very popular.

The page I need help with: [log in to see the link]