Raw food diet is a good way to go. You should ask morless in his forum for suggestions with your diet and psoriasis. Liver Cleansing is important and the most effective method is the liver flush. A series of 4- 8 flushes would do wonders.
Colon hydotherapy is another effective method that will eliminate waste from the colon.
I am not surprised that your drugs didn't work. Curezone is about educating not medicating. There are serious side effects with drugs as well.
A good book on the subject is Healing Psoriasis Naturally by John Pagano and you should be reading the recommended messages in this forum as well