wow, those pictures are something. I don't know what to tell you as far as a name.
We have been dealing with something too. I think it's leather ear - thought you might be describing that too, but your pictures make me think otherwise. (fyi if you want to know more about this
http://www.shooterdog.com/alexfaq3.htm - about halfway down the page)
I wanted to tell you about this great shampoo I got from my vet (he's traditional vet turned holistic/acupuncture vet - but does it all depending on the needs) this is the website for the shampoo - you can buy from them.
http://www.tomerlabs.com/pet_products/phytoclens.html
I would definitely find a good shampoo -- this one contains:
PHYTOCLENS Herbal Shampoo
Phytoclens Himalayan Cedar Shampoo contains the natural essential oils of Himalayan cedarwood (Cedrus deodara) and Eucalyptus leaf oil (Eucalyptus globulus). Phytoclens use in a regular regimen promotes healthy skin and coat.
This is what I found about those ingredients
oils of Himalayan cedarwood
http://www.aroma-pure.com/cedarwood.htm
Eucalyptus leaf oil
http://www.aroma-pure.com/eucalyptus.htm
Or at the very least try a very, very good oatmeal shampoo.
What are you feeding Louie?? I just wonder if it is an allergic reaction to something in his diet