if sys.hexversion < 0x02040000:
stderr_write ("Python 2.4 or newer is required to run this program.\n\
Please upgrade Python from http://python.org/download/, and if you use MacOS X,\n\
-please read installation instructions in Application usage.")
+please read 'Setup for MacOS X' in Application Usage.")
os.system ("open http://python.org/download/")
sys.exit (2)