I have no idea how to mod or if is even possible to do what i'm thinking could be done, but earlier on one of the forums I go to, someone posted this particular program:
http://www.facegen.com/
Apparently Oblivion uses the same program to make the faces in the game.
What you can do with this program is upload your own picture and it'll automatically configure the face to look as close to the picture you gave it as possible.
I checked out the settings in the program and the settings in oblivion and they are pretty much word for word.
Thing is, you can't translate the settings from the program to oblivion that well at all. I mean, lets face it, the face creation in oblivion is pretty horrid. I mean, you move this one slider to exactly where you want it, and then you move another slider and it screws up everything you just did, making recreating your face damn near futile.
Anyways, down to the point, the mod idea i'm suggesting is letting you put numerical values in the face creation thing in oblivion so that way you can upload your picture to that program and copy the settings number for number directly over to oblivion and basically net yourself an avatar that looks almost exactly like you.
Is this even possible though?