I think I get it.  I'm assuming that everything below the Diffuse_Color is your desired values and it's part of the duplicate base model that you saved.

If you inject different eye color etc from the library, do you get that white eye problem or is it just unique for the base setup?  If so just change the texture node for the left and right iris (provided that the cornea is completely transparent).  Same way as the following: 

Step one: locate where the face, body, and eye textures are located on your computer 

 Step two:  Use the  figure that you made all the corrections for.

                    Click on your face texture node that is connected to your Diffuse_color channel and locate the appropriate texture node that you want ( Paint 1, 2,3 or 4) and replace the current texture node image.  Just your diffuse color texture map will change .  Do the same for each eye, if you want to change them and also the body parts. 

For the print screen to work, you should have your paint software program running at the same time or it may not appear (paste is not activated).  That also applies to anything that you highlight and want to copy from here for example, ensure that your MS word etc open before you hit the Prnt Screen.  Jan