Gridmarket theme remove featured images product page?

Hi, I'm trying to set up gridmarket theme. http://3dartistnetwork.com/freetheme1/store/products/sample-product/

How do I remove the featured image only for the product page. I want the featured image to still show on product grid and check out?

Can someone recommend a good multi sites lightbox? I wanted to use "create gallery" in the media library but the pictures open to a new page instead of on the product page.

Thanks
Kimberly