i think I saw a message in the excema or Zapper Forum
about clearing psioriasis by placing the zapper ON the patches of skin. poster said it shrunk significant bits-- though there were still patches.
I think I also saw a regimen of taking 4 pills of Oil of Oregano (all pills are not equal, check the levels of carvacrol. my oil of oregano pills have a carvocrol level of between 70-85 ) 3 times a day specifically FOR psioriasis. (hint: as with all medicines, the key is taking it like clockwork spaced evenly apart. I've heard some theorize that fifteen minutes one way or another can significantly affect the usefulness of a given regimen.)
also-- since you're posting in dr. beck forum, consider getting:
a blood purifier (recommendation is the RSG-2 on toolsforhealing.com)
a mag pulser (sota's pretty much the only one that has one that follows dr. beck.)
an ozonator (go to oxygen forum and ask ozoneman..cheap recommendation is the enaly on ebay)
a CS maker (though a lot of blood purifiers like the RSG-2 come with a CS maker.)
Check out toolsforhealing.com
p.s. even if you get the cheapest ones it's still going to run you around $800 so get one item, experiment with that for awhile (like CS or ozonated water or oil) and then if you need more go for the other items.