how to add a method without coding it directly into app?

[ronald.evangelista]

i'm missing something here.
how would I code this outside the application to be shared with other 
Camping apps?

module Blog::Controllers
   module AuthenticationHelper
       def self.included(base)
           class << base
               define_method :authenticate do |*a|
                   a.each do |meth|
                       if method_defined?(meth.to_s)
                           alias_method "__#{meth}__", meth
                           class_def(meth) do |*a|
                               @[EMAIL PROTECTED]
                               return redirect(Login) if @state.blank? 
or @state.user_id.nil?
                               send("__#{meth}__", *a)
                           end
                       end
                   end
               end
           end
       end
   end
end

any hints? thanks!
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