I really don't think that there's any issue sending printout using a pagesetting software, or a wordprocessor. If anything, it makes things much tidier, since pictures can have captions typed, and since it's setup as a small collection, hopefully with numbers and it can be used as a reference in the relationship essays, or when answering the IMM5490 (The Sponsored spouse/partner questionnaire).
why should printing several photos per one A4 or letter sheet be a problem? All they ask is to leave the pages loose, not to put photos in an album, binder, or in a container. They never mention anything about multiple photos per page.
As for copying, I'd think about it this way: these photos are a very important part of representing the relationship: it is a visual representation, and it puts a face of what up to that point is described in words in all those formal forms. The challenge here is to represent how loving and genuine the relationship is, and in my mind, it will definitely need more that words alone. I'd think we need to show a more complete picture. So the emails, photos, boarding passes, greeting cards, etc will each become a piece in the puzzle, that will make up the complete picture of the relationship in front of the VO, and hopefully, (s)he will see it the way it is and the way it functions. So bottom-line, the more clear the photos are the better.
My 2cents
BCG