That's a hard question to answer.
DougRPG has sent two graphics roms. The last one he sent had the end-game stuff, and the first one that he sent had graphics inserted up to the second nation in the game, but he said that he was going to redo some of his old work to make it conform to some new standard (since the first way that he was inserting before had some sort of issue). He said he was planning to "work backwards." So I have two graphics roms from him, some with certain graphics missing, and another with different graphics missing.
All of the graphics are important, but I suppose the most crucial graphics for the storyline would have to be located in the fourth nation in the game. Those aren't inserted in any of the versions he sent me, though he has pictures on his twitter account of those working in the game. He just never sent them.
The most important graphics to me (and to Cargodin, the packaging editor) would have to be some of the festival signs, and two signs in the third nation in the game, because I need to take English screenshots of those for the manual. (The English packaging and manual is complete, aside from four screenshots that currently show Japanese on the signs. I need those signs inserted so that I can take the last remaining pictures for the manual. It's the only thing stopping the manual from being fully ready for checking/release.)
Basically, once the graphics get hacked, the manual's done AND testing begins. It's just a matter of waiting until that happens. I've sent e-mails, but that's all I can do. Until there's progress with the graphics, my hands are tied, so I'm moving on to other projects.