Oh god, that ear. Well, I was able to put a scouter on a stunfisk, this shouldn't be any harder.
---------- Post added 2013-01-13 at 08:19 PM ----------
Been a while, so I can't remember the exact procedure, but I believe I took a scouter image off google that looks to be in a similar position to the ava/sig I'm doing, and place it over top. Then I use the magic wand tool on the scouter and pick up all the red or green parts. Once the entire screen part of the scouter was selected, I'd switch to the lower layer where the eye is, then copy and past it over top of the scouter screen. Then I reduce that layer's opacity to make it look transparent.
So while it looks like you can see through the scouter to see the eye, it's actually the reverse. You can see through the eye and parts of the face to see the scouter.