That's correct. They're not for in-game.
I'm thinking that size-wise, they should be about half and 8 1/2 by 11 page.
I haven't thought about what I want exactly, b/c in some senses it doesn't matter, as long as the picture is appropriately themed. I only thought of it tonight b/c I am working on one of the manuals while doing my homework.
No pressure, by the way. I just thought I'd mention it in case you had something you might want to show off.