diff --git a/judge/scripts/lib/engine.rb b/judge/scripts/lib/engine.rb
deleted file mode 100644
--- a/judge/scripts/lib/engine.rb
+++ /dev/null
@@ -1,175 +0,0 @@
-require 'fileutils'
-require 'ftools'
-require 'lib/dir_init'
-
-module Grader
-
-  #
-  # A grader engine grades a submission, against anything: a test
-  # data, or a user submitted test data.  It uses two helpers objects:
-  # room_maker and reporter.
-  #
-  class Engine
-    
-    attr_writer :room_maker
-    attr_writer :reporter
-
-    def initialize(room_maker=nil, reporter=nil)
-      @config = Grader::Configuration.get_instance
-
-      @room_maker = room_maker || Grader::SubmissionRoomMaker.new 
-      @reporter = reporter || Grader::SubmissionReporter.new
-    end
-    
-    # takes a submission, asks room_maker to produce grading directories,
-    # calls grader scripts, and asks reporter to save the result
-    def grade(submission)
-      current_dir = `pwd`.chomp
-
-      user = submission.user
-      problem = submission.problem
-
-      # TODO: will have to create real exception for this
-      if user==nil or problem == nil
-        @reporter.report_error(submission,"Grading error: problem with submission")
-        #raise "engine: user or problem is nil"
-      end
-
-      # TODO: this is another hack so that output only task can be judged
-      if submission.language!=nil
-        language = submission.language.name
-        lang_ext = submission.language.ext
-      else
-        language = 'c'
-        lang_ext = 'c'
-      end
-
-      # FIX THIS
-      talk 'some hack on language'
-      if language == 'cpp'
-        language = 'c++'
-      end
-
-      # COMMENT: should it be only source.ext?
-      if problem!=nil
-        source_name = "#{problem.name}.#{lang_ext}"
-      else
-        source_name = "source.#{lang_ext}"
-      end
-
-      begin
-        grading_dir = @room_maker.produce_grading_room(submission)
-        @room_maker.save_source(submission,source_name)
-        problem_home = @room_maker.find_problem_home(submission)
-
-        # puts "GRADING DIR: #{grading_dir}"
-        # puts "PROBLEM DIR: #{problem_home}"
-
-        dinit = DirInit::Manager.new(problem_home)
-
-        dinit.setup do
-          copy_log = copy_script(problem_home)
-          save_copy_log(problem_home,copy_log)
-        end
-      
-        call_judge(problem_home,language,grading_dir,source_name)
-
-        @reporter.report(submission,"#{grading_dir}/test-result")
-
-        dinit.teardown do
-          copy_log = load_copy_log(problem_home)
-          clear_copy_log(problem_home)
-          clear_script(copy_log,problem_home)
-        end
-
-      rescue RuntimeError => msg
-        @reporter.report_error(submission,"Grading error: #{msg}")
-
-      ensure
-        @room_maker.clean_up(submission)
-        Dir.chdir(current_dir)   # this is really important
-      end
-    end
-    
-    protected
-    
-    def talk(str)
-      if @config.talkative
-        puts str
-      end
-    end
-
-    def call_judge(problem_home,language,grading_dir,fname)
-      ENV['PROBLEM_HOME'] = problem_home
-      
-      talk grading_dir
-      Dir.chdir grading_dir
-      cmd = "#{problem_home}/script/judge #{language} #{fname}"
-      talk "CMD: #{cmd}"
-      system(cmd)
-    end
-
-    def get_std_script_dir
-      GRADER_ROOT + '/std-script'
-    end
-
-    def copy_script(problem_home)
-      script_dir = "#{problem_home}/script"
-      std_script_dir = get_std_script_dir
-
-      raise "std-script directory not found" if !FileTest.exist?(std_script_dir)
-
-      scripts = Dir[std_script_dir + '/*']
-      
-      copied = []
-
-      scripts.each do |s|
-        fname = File.basename(s)
-        if !FileTest.exist?("#{script_dir}/#{fname}")
-          copied << fname
-          system("cp #{s} #{script_dir}")
-        end
-      end
-      
-      return copied
-    end
-
-    def copy_log_filename(problem_home)
-      return File.join(problem_home, '.scripts_copied')
-    end
-
-    def save_copy_log(problem_home, log)
-      f = File.new(copy_log_filename(problem_home),"w")
-      log.each do |fname|
-        f.write("#{fname}\n")
-      end
-      f.close
-    end
-    
-    def load_copy_log(problem_home)
-      f = File.new(copy_log_filename(problem_home),"r")
-      log = []
-      f.readlines.each do |line|
-        log << line.strip
-      end
-      f.close
-      log
-    end
-
-    def clear_copy_log(problem_home)
-      File.delete(copy_log_filename(problem_home))
-    end
-
-    def clear_script(log,problem_home)
-      log.each do |s|
-        system("rm #{problem_home}/script/#{s}")
-      end
-    end
-
-    def mkdir_if_does_not_exist(dirname)
-      Dir.mkdir(dirname) if !FileTest.exist?(dirname)
-    end
-    
-  end
-  
-end