Is there a way to have more than one cover image per entry in the pedias?
At the moment there is only one 'official' space for an image, the cover image well. But you can link as many images as you like to an entry. Just drag the image over the info view of the entry in DVDpedia (the one below the table view) and the image will automatically be linked to the entry. To access it again, click on the link in the info view or the 'Link' button in the toolbar.
If you'd then like to keep everything tidy and in one place, you can also move linked images and files to the Bookpedia data folder. To do that, open the Edit window for the entry, go into the 'Links' tab, select the linked files and press the 'Move' button.