Are you trying to make a video with the P4 dialogue boxes? If you are I can probably tell you how to do it with Sony Vegas if you have photoshop you can probably make something similar. Then save it as a pic or you can just mask one out but i think it would come out a little sloppy in my opinion. Persona 4 dialogue box are just made out of 2-3 rectangles. One long one with an orange rectangle rotated slightly and another piece of another one on the bottom right sticking out. You would do 2-3 rectangles with a couple of layers. I hope this is what you were asking for lol.
You know, I had the same idea but I also want the full battle display menu and all the other options. I was thinking of making a RL Persona Battle but I lack the skills in Photoshop and Sony Vegas to make it. I have the idea but find it difficult how to picture it and get it done.
You should get Photoshop and look up tuts on youtube. If your gonna do something like that I suggest you use Adobe After Effects instead of Sony Vegas. There was a video on youtube of RL Persona Battle (kinda like a movie) something like that but I cannot find it ill search more tommrow maybe you've seen it its fanmade.