Cats/I can't afford a vet/Cat Miliary Dermatitis (papulocrustous dermatitis)?

[kzarah]

Judging from google images and a description of Cat Miliary Dermatitis (papulocrustous dermatitis) http://www.sniksnak.com/cathealth/mil-derm.html, I believe my Little Lulu has this condition.
Unfortunately, I cannot afford a vet or medications. Is there any help out there? I just don't know what to do and I love her too much to not do anything. Can someone give me some advice?  Today I put hydrocortozone .1% on it and it seem to give her comfort. 
Also, I wonder if I can use advantage on her during her current flare up?
Daniel

[Satori]

Oatmeal shampoo is soothing to animals with skin conditions.

Does she have fleas? I had a cat who was allergic to fleas and got a skin irritation.