Set the texture to screen, opacity 75%. I found it looked better under the exclusion layer, but this could vary depending on the light texture. The icon should look something like this:
Last thing left was text. I didn't want to add anything really fancy, so i just wrote "disappointment" in ITC Garamond, size 8, and placed it next to Rory's head. The finished icon came out like so:
hope that helped, i'd love to see if you guys improved on it or did anything with it :)