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If you want to store more than one photo for a given contact, you'll need to add either an additional container field or set up a related table where records with container fields store your image files such that 1, 2 or more pictures may be linked to a given contact.
To pull up photos of linked contacts will like require some additional design work on your starter solution to make it possible to link different contacts to each other. Without those links, FileMaker as no way to determine which photos of related contacts to display.