class SomeModel < ActiveRecord::Base
 
  has_attached_file :image_one,
    :path => "public/system/:class/:id/:filename",
    :url => "/system/:class/:id/:basename.:extension"
 
  has_attached_file :image_two,
    :path => "public/system/:class/:id/:filename",
    :url => "/system/:class/:id/:basename.:extension"
end

By default Paperclip will store your files in /system/:attachment/:id/:style/:filename. By passing the :path and :url options to the has_attached_file method in your model you can change where the uploaded files will be stored as well as where they can be accessed. The :path is the directory in your application where your files will be stored. The :url is the url that users will use to render the image.

Paperclip Resources

• Paperclip RDoc - http://dev.thoughtbot.com/paperclip/
• Paperclip Railscasts - http://railscasts.com/episodes/134-paperclip
• Jim Neath - Paperclip: Attaching Files in Rails - http://jimneath.org/2008/04/17/paperclip-attaching-files-in-rails/