diff --git a/build.py b/build.py
index 0f39762..73c0742 100755
--- a/build.py
+++ b/build.py
@@ -13,47 +13,10 @@ from config.projpaths import *
 from config.configuration import *
 from scripts.conts import containers
 from configure import *
-from optparse import OptionParser
-from scripts.cml.generate_container_cml import *
-
-# NOTE:
-# The scripts obtain all the configuration data (a set of class
-# instances) from the configuration shelve, so we don't pass
-# any arguments here.
+from config.parse_options import *
 
 def main():
-    autogen_true = 0
-    usage = "usage: %prog [options] arg"
-    parser = OptionParser(usage)
-
-    parser.add_option("-a", "--arch", type = "string", dest = "arch",
-                      help = "Use configuration file for architecture")
-    parser.add_option("-c", "--num-containers", type = "int", dest = "ncont",
-                      help = "Maximum number of containers available in configuration")
-    parser.add_option("-f", "--use-file", dest = "cml_file",
-                      help = "Supply user-defined cml file"
-                             "(Use only if you want to override default)")
-    parser.add_option("-w", "--wipeout-old-config", action = "store_true",
-                      default = False, dest = "wipeout",
-                      help = "Wipe out existing configuration file settings")
-
-    (options, args) = parser.parse_args()
-
-    autogen_true = len(sys.argv) > 1 or not os.path.exists(CML2_CML_FILE)
-
-    if autogen_true and not options.arch:
-        print "No arch supplied (-a), using `arm' as default."
-        options.arch = "arm"
-    if autogen_true and not options.ncont:
-        options.ncont = 4
-        print "Max container count not supplied (-c), using %d as default." % options.ncont
-
-    # Regenerate cml file if options are supplied or the file doesn't exist.
-    if autogen_true:
-        generate_container_cml(options.arch, options.ncont)
-        if options.wipeout == 1 and os.path.exists(CML2_OLDCONFIG_FILE):
-            print "Deleting %s" % CML2_OLDCONFIG_FILE
-            os.remove(CML2_OLDCONFIG_FILE)
+    build_parse_options()
 
     #
     # Configure
diff --git a/config/parse_options.py b/config/parse_options.py
new file mode 100644
index 0000000..766df81
--- /dev/null
+++ b/config/parse_options.py
@@ -0,0 +1,50 @@
+#! /usr/bin/env python2.6
+# -*- mode: python; coding: utf-8; -*-
+#
+from optparse import OptionParser
+import os, sys
+
+PROJRELROOT = '../'
+
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))
+
+from scripts.cml.generate_container_cml import *
+
+# Parse options + autogenerate cml rule file if necessary.
+def build_parse_options():
+    autogen_true = 0
+    usage = "usage: %prog [options] arg"
+    parser = OptionParser(usage)
+
+    parser.add_option("-a", "--arch", type = "string", dest = "arch",
+                      help = "Use configuration file for architecture")
+    parser.add_option("-c", "--num-containers", type = "int", dest = "ncont",
+                      help = "Maximum number of containers that will be "
+                             "made available in configuration")
+    parser.add_option("-f", "--use-file", dest = "cml_file",
+                      help = "Supply user-defined cml file "
+                             "(Use only if you want to override default)")
+    parser.add_option("-r", "--reset-old-config", action = "store_true",
+                      default = False, dest = "reset_old_config",
+                      help = "Reset configuration file settings "
+                             "(If you had configured before and changing the "
+                             "rule file, this will reset existing values to default)")
+
+    (options, args) = parser.parse_args()
+
+    autogen_true = len(sys.argv) > 1 or not os.path.exists(CML2_CML_FILE)
+
+    if autogen_true and not options.arch:
+        print "No arch supplied (-a), using `arm' as default."
+        options.arch = "arm"
+    if autogen_true and not options.ncont:
+        options.ncont = 4
+        print "Max container count not supplied (-c), using %d as default." % options.ncont
+
+    # Regenerate cml file if options are supplied or the file doesn't exist.
+    if autogen_true:
+        generate_container_cml(options.arch, options.ncont)
+        if options.reset_old_config == 1 and os.path.exists(CML2_OLDCONFIG_FILE):
+            print "Deleting %s" % CML2_OLDCONFIG_FILE
+            os.remove(CML2_OLDCONFIG_FILE)
+
diff --git a/configure.py b/configure.py
index 090c623..7147914 100755
--- a/configure.py
+++ b/configure.py
@@ -7,6 +7,7 @@ from config.projpaths import *
 from config.configuration import *
 from scripts.bare.bare_generator import *
 from scripts.conts.generate_kernel_cinfo import *
+from config.parse_options import *
 
 def cml2_header_to_symbols(cml2_header, config):
     with file(cml2_header) as header_file:
@@ -64,7 +65,6 @@ def configure_kernel(cml_file):
     generate_kernel_cinfo(config.containers, KERNEL_CINFO_PATH)
 
 if __name__ == "__main__":
-    if not os.path.exists(join(CML2_CONFIG_SRCDIR, 'out.cml')):
-        generate_container_cml(4)
+    build_parse_options()
     configure_kernel(join(CML2_CONFIG_SRCDIR, "out.cml"))