diff --git a/libprs500/__init__.py b/libprs500/__init__.py
index 518b4a6f0f..135db5a86e 100644
--- a/libprs500/__init__.py
+++ b/libprs500/__init__.py
@@ -32,7 +32,7 @@ the following rule in C{/etc/udev/rules.d/90-local.rules} ::
   BUS=="usb", SYSFS{idProduct}=="029b", SYSFS{idVendor}=="054c", MODE="660", GROUP="plugdev"
 You may have to adjust the GROUP and the location of the rules file to suit your distribution.
 """
-__version__   = "0.3.0a1"
+__version__   = "0.3.0a2"
 __docformat__ = "epytext"
 __author__    = "Kovid Goyal <kovid@kovidgoyal.net>"
 TEMPORARY_FILENAME_TEMPLATE = "libprs500_"+__version__+"_temp"
diff --git a/setup.py b/setup.py
index b77885019c..348da471f7 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 ##    You should have received a copy of the GNU General Public License along
 ##    with this program; if not, write to the Free Software Foundation, Inc.,
 ##    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-#!/usr/bin/env python
+#!/usr/bin/env python2.5
 import ez_setup
 ez_setup.use_setuptools()
 
@@ -26,9 +26,15 @@ ez_setup.use_setuptools()
 #    easy_install(["-f", "http://www.pythonware.com/products/pil/", "Imaging"])
 #except: pass
 
+import sys
 from setuptools import setup, find_packages
 from libprs500 import __version__ as VERSION
 
+if sys.hexversion < 0x2050000:
+    print >> sys.stderr, "You must use python >= 2.5 Try invoking this script as python2.5 setup.py."
+    print >> sys.stderr, "If you are using easy_install, try easy_install-2.5"
+    sys.exit(1)
+
 setup(
       name='libprs500',
       packages = find_packages(), 
@@ -43,7 +49,8 @@ setup(
       zip_safe = True,      
       install_requires=["pyusb>=0.3.5","pyxml>=0.8.4"],
       dependency_links=["http://sourceforge.net/project/showfiles.php?group_id=145185",
-                                      "http://sourceforge.net/project/showfiles.php?group_id=6473",
+                        "http://sourceforge.net/project/showfiles.php?group_id=6473",
+                        "http://easynews.dl.sourceforge.net/sourceforge/pyusb/pyusb-0.3.5.tar.gz",
                                     ],
       description='Library to interface with the Sony Portable Reader 500 over USB. Also has a GUI with library management features.',
       long_description =