What Ego replied with is what I want to do. I'll try that now!
Edit: Ok, quick update. I tried that, and it didn't work. So instead, I ignored the added layer and decided to type my text right on the image layer. Worked like a charm on the main layer.
I forgot to change the layer properties.
Thank you guys/gals!
Edit2:
Difference, Negation, and Xor all do this effect. I added this edit for anyone needing to know what modes will do this.