keyboard and mouse

Hey ya'll :) I recently got back into my childhood game. Is there any modern FPS keyboard mapping scheme I could use? Whenever I try changing it around, it ends messing up something else. Any tips or links?

About a month ago, I tried getting the Mouse Thingy, and shortly after, I just kinda couldn't use keyboard and mouse. The settings say that I do use normal wasd controls and everything else I had set before, but for some reason, I move with the side buttons on my mouse, and nothing on my...