Windows installer:  In the Start menu IDLE shortcut, explictly invoke the
pythonw.exe we just installed.  Making Windows key off the .pyw extension
instead screws people with multiple Python installations (reported more
than once on c.l.py).
diff --git a/PCbuild/python20.wse b/PCbuild/python20.wse
index c7e0dcb..c7f65b1 100644
--- a/PCbuild/python20.wse
+++ b/PCbuild/python20.wse
@@ -1160,8 +1160,9 @@
   Flags=00001010
 end
 item: Create Shortcut
-  Source=%MAINDIR%\Tools\idle\idle.pyw
+  Source=%MAINDIR%\pythonw.exe
   Destination=%GROUP%\IDLE (Python GUI).lnk
+  Command Options=%MAINDIR%\Tools\idle\idle.pyw
   Working Directory=%MAINDIR%
   Key Type=1536
   Flags=00000001