Final fantasy II (Nes): Alternate Realm

I'll need to make screenshots of a more fascinating view of things.

Also, I'm planning sooner or later to try beginning editing map tiles. And the issue of not knowing how to edit ppu or oam still lingers greatly. I find various sources online that tell about it. Yet the one thing I never see is a explanation of how to best access the code. Cause I still haven't figured out which way I could access ppu or oam. Getting access to those may improve the graphics quality of certain things greatly.