Wordpress photo uploader

We are looking for an easier way to upload photos for slideshows in different pages in WordPress. The slideshow we are using is jQuery supersized for full screen slideshow. At present, we have it implemented by a custom post type named slider items. This allows us to create different posts with featured image being the image we want to appear. The posts/slider items are tagged together by creating a slider category and naming it exactly the same as the page name we want the photos to be shown in. We use the WordPress Media Library to mass upload photos. (We have word press multisite installed). It would be convenient if the plugin worked together with the Media Library, but if that is not possible, the plugin should include its own uploader/library, with drag and drop upload and the ability to upload multiple files/folders at a time. After uploading the photos for a website, we want to add a functionality by which we can select photos from the uploaded photos and assign them to different pages, preferably through dragging and dropping from the uploaded photos into the page we want. It would be good to have the functionality in a separate menu item in the admin area with a list/menu of all the pages of the website in it and the option to assign photos to each page and also to upload the photos of the website within that menu item. Alternatively, this could be integrated in the preexisting media library We should also be able to set the order in which the photos appear in each page, preferably by dragging and dropping them in a different order. We should be able to see the thumbnails of all the photos assigned to each page, not just a list of file names. We should also be able to assign each photo to multiple pages if we want to, and to put it in a different order in each page it is assigned to, without having to re-upload the photo. When a page is not assigned any photos, by default that page should have the photos of the home/front page assigned. The pages should have the option to disable the photos also, so on checking the option no photos would be applicable to the page.