Adding multiple nodes using a single form
Your question is so specific to your implementation; what you want to do is create a node with some single value fields and multiple images, each image with a title, description and nodereference.

It is the last part of the above that is actually the question: How do you add fields to an image?


The file entity module allows you to add fields to a file, but those fields are not available on the node edit form, you have to go to admin/content/file to add these values.
The Field Collection Module allows you to define a set of fields, so on your node you would define a field collection field which has an image, a caption, nodereferences or whatever. (not too clear...try it out)