--- a/ProgTutorial/Intro.thy	Mon Oct 12 17:07:17 2009 +0200
+++ b/ProgTutorial/Intro.thy	Tue Oct 13 22:57:25 2009 +0200
@@ -2,9 +2,16 @@
 imports Base
 begin
 
+(*<*)
+setup{*
+open_file_with_prelude 
+  "Intro_Code.thy"
+  ["theory Intro", "imports Main", "begin"]
+*}
+(*>*)
+
 chapter {* Introduction *}
 
-
 text {*
    \begin{flushright}
   {\em