diff --git a/README b/README
index e5ff539..4f74942 100644
--- a/README
+++ b/README
@@ -27,7 +27,8 @@
 
     1.  Pre-requisites:
         * Root privilege on host
-        * Python 2.5 (or so)
+        * Python 2.5.  You can run platforms using eth interfaces with
+          Python 2.4.
         * oftest checked out (called <oftest> here)
         * scapy installed:  http://www.secdev.org/projects/scapy/
         * Doxygen and doxypy for document generation (optional)
@@ -134,6 +135,31 @@
     parameters this way.  Each test case in the new file must derive
     from unittest.TestCase.
 
+
+Using CentOS/RHEL
++++++++++++++++++
+
+    CentOS/RHEL have two challenges:  they are very tied to Python 2.4
+    (and Scapy requires Python 2.5 for its latest version) and they
+    require a kernel upgrade to use veth pairs for local platform
+    testing.  
+
+    If you only need to control eth interfaces for a remote platform,
+    you can use CentOS/RHEL.  The key is to download scapy-1.2 from
+    the following link:
+
+    wget http://hg.secdev.org/scapy/raw-file/v1.2.0.2/scapy.py
+
+    See: http://www.dirk-loss.de/scapy-doc/installation.html#installing-scapy-v1-2
+    for more info.
+
+    Copy scapy.py to /usr/lib/python2.4/site-packages
+
+    If you hit an error related to importing scapy.all, you just need
+    to change the import to refer to scapy (not scapy.all).  See
+    examples in parse.py for example.
+
+
 Other Info
 ++++++++++
 
diff --git a/src/python/oftest/parse.py b/src/python/oftest/parse.py
index 9bd09b6..d60940a 100644
--- a/src/python/oftest/parse.py
+++ b/src/python/oftest/parse.py
@@ -11,7 +11,10 @@
 try:
     from scapy.all import *
 except:
-    sys.exit("Need to install scapy for packet parsing")
+    try:
+        import scapy as scapy
+    except:
+        sys.exit("Need to install scapy for packet parsing")
 
 """
 of_message.py
diff --git a/tests/testutils.py b/tests/testutils.py
index 6f8e0b4..df7831e 100644
--- a/tests/testutils.py
+++ b/tests/testutils.py
@@ -1,5 +1,13 @@
 
-import scapy.all as scapy
+import sys
+
+try:
+    import scapy.all as scapy
+except:
+    try:
+        import scapy as scapy
+    except:
+        sys.exit("Need to install scapy for packet parsing")
 
 import oftest.controller as controller
 import oftest.cstruct as ofp
diff --git a/tools/pylibopenflow/bin/cstruct2py-get-struct.py b/tools/pylibopenflow/bin/cstruct2py-get-struct.py
old mode 100755
new mode 100644
index 4b8a350..d78d7c8
--- a/tools/pylibopenflow/bin/cstruct2py-get-struct.py
+++ b/tools/pylibopenflow/bin/cstruct2py-get-struct.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script reads struct from C/C++ header file and output query
 
 Author ykk
diff --git a/tools/pylibopenflow/bin/cstruct2py-pythonize.py b/tools/pylibopenflow/bin/cstruct2py-pythonize.py
old mode 100755
new mode 100644
index 47cbffb..39508cf
--- a/tools/pylibopenflow/bin/cstruct2py-pythonize.py
+++ b/tools/pylibopenflow/bin/cstruct2py-pythonize.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script reads struct
 
 Author ykk
diff --git a/tools/pylibopenflow/bin/cstruct2py-query-cheader.py b/tools/pylibopenflow/bin/cstruct2py-query-cheader.py
old mode 100755
new mode 100644
index 3d23ef0..ed82316
--- a/tools/pylibopenflow/bin/cstruct2py-query-cheader.py
+++ b/tools/pylibopenflow/bin/cstruct2py-query-cheader.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script reads C/C++ header file and output query
 
 Author ykk
diff --git a/tools/pylibopenflow/bin/pyopenflow-get-struct.py b/tools/pylibopenflow/bin/pyopenflow-get-struct.py
old mode 100755
new mode 100644
index 78297c5..d07d85e
--- a/tools/pylibopenflow/bin/pyopenflow-get-struct.py
+++ b/tools/pylibopenflow/bin/pyopenflow-get-struct.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script reads struct from OpenFlow header file and output query
 
 (C) Copyright Stanford University
diff --git a/tools/pylibopenflow/bin/pyopenflow-lavi-pythonize.py b/tools/pylibopenflow/bin/pyopenflow-lavi-pythonize.py
old mode 100755
new mode 100644
index bb8c180..914a424
--- a/tools/pylibopenflow/bin/pyopenflow-lavi-pythonize.py
+++ b/tools/pylibopenflow/bin/pyopenflow-lavi-pythonize.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script generate class files for messenger and lavi in NOX, 
 specifically it creates a Python class for each data structure.
 
diff --git a/tools/pylibopenflow/bin/pyopenflow-load-controller.py b/tools/pylibopenflow/bin/pyopenflow-load-controller.py
old mode 100755
new mode 100644
index aef34f7..715a73a
--- a/tools/pylibopenflow/bin/pyopenflow-load-controller.py
+++ b/tools/pylibopenflow/bin/pyopenflow-load-controller.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script fakes as n OpenFlow switch and
 load the controller with k packets per second.
 
diff --git a/tools/pylibopenflow/bin/pyopenflow-ping-controller.py b/tools/pylibopenflow/bin/pyopenflow-ping-controller.py
old mode 100755
new mode 100644
index e5aa030..cae3a43
--- a/tools/pylibopenflow/bin/pyopenflow-ping-controller.py
+++ b/tools/pylibopenflow/bin/pyopenflow-ping-controller.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script fakes as an OpenFlow switch to the controller
 
 (C) Copyright Stanford University
diff --git a/tools/pylibopenflow/bin/pyopenflow-pythonize.py b/tools/pylibopenflow/bin/pyopenflow-pythonize.py
old mode 100755
new mode 100644
index 97b7c8f..6da4af9
--- a/tools/pylibopenflow/bin/pyopenflow-pythonize.py
+++ b/tools/pylibopenflow/bin/pyopenflow-pythonize.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/env python
 """This script generate openflow-packets.py which
 creates Python class for each data structure in openflow.h.