Using uncropped images on product pages in Marketpress


First off apologies if this is similar to a previous question I asked, but I’m having concerns about all my images being cropped.

I am using the Marketpress plugin and was wondering if there was a way to display images in an uncropped fashion on the actual product pages? I see that thumbnails are used when you use a shortcode for listing products using the product grid(see my homepage:, but I’d really like each image to be displayed uncropped once you click on that thumbnail and are redirected to the product. The only way I can think of doing this is by inserting the image into the post, but then you end up with both a thumbnail and a fullsize image on each post. If I remove the featured product it displays correctly but then of course the thumbnail disappears from the homepage. Total noob here, so any help would be appreciated. Thanks!