Now, I'm using a bunch of Dragon Warrior 1 (NES) maps created mainly by a guy called Chiasm for this Let's Play I'm doing on the game. So, what I'm wondering is, what's generally common courtesy when using someone's maps? Should I contact him/her and say I'm using their maps? Leave a disclaimer in the map itself that they made it? Basically, I'm not worried about copyright laws or anything, I just don't want to be a pill, that's all 
.
.