Adapt 'Sell Media' WordPress Plugin

We need the 'Sell Media' WordPress plugin customising a little bit. We're selling landscape and portrait images. In sell media, the image width x height is set in a price group. Which means if you assign a landscape image to a portrait price group, the aspect ratio will change and ruin the image. So, we've had to make 2 price groups, one for portrait and one for landscape. This means that photographers have to complete two uploads when they add files, all portrait images need to be bulk uploaded and added to the portrait price group. Then all landscape images need to be uploaded and added to the landscape price group. This isn't suitable for the project. We need photographers to be able to bulk upload *all* images in one go and have the plugin check *each image* to see if it's portrait or landscape and assign the image to the correct price group. The drop down menu with 'select price group' shouldn't be there once this is added because the site will auto-select the correct price group. Any questions please ask.