Edit Normal and Specular Maps for Eyes

[SoloManGames]

Is it possible to edit the normal and specular maps for the eyes? And I only want to apply the new maps to a single head morph. As you can see below I have edited the diffuse map for the eyes of my head morph (I just moved the iris up several pixels) but there is a bright lining under the iris which I assume is from either the normal or spec maps:

 

http://content.screencast.com/users/syclonix/folders/Jing/media/bb5f284a-a156-4c0a-be03-ff3b99b4f493/2010-09-19_1845.png

 

Here's what it looks like without an eye texture (notice the iris is vertically centered again):

 

http://content.screencast.com/users/syclonix/folders/Jing/media/9f3456ca-a6f0-4a81-aa21-f1e3ecca1ffa/2010-09-19_1856.png