diff -r a0ca00815cc4 -r 928a955e742b configs/common/Options.py
--- a/configs/common/Options.py	Fri Sep 28 09:35:25 2012 -0400
+++ b/configs/common/Options.py	Wed Oct 03 17:30:13 2012 +0200
@@ -32,6 +32,10 @@
 from Benchmarks import *
 
 def addCommonOptions(parser):
+    parser.add_option("--post-script", type="string",
+                      help = "script to execute after configuration "
+                      "(provides 'root' and 'options')")
+
     # system options
     parser.add_option("--cpu-type", type="choice", default="atomic",
                       choices = ["atomic", "timing", "detailed", "inorder",
diff -r a0ca00815cc4 -r 928a955e742b configs/example/fs.py
--- a/configs/example/fs.py	Fri Sep 28 09:35:25 2012 -0400
+++ b/configs/example/fs.py	Wed Oct 03 17:30:13 2012 +0200
@@ -181,4 +181,13 @@
     VncServer.frame_capture = True
 
 Simulation.setWorkCountOptions(test_sys, options)
+
+# Let the user finish-up setting parameters
+if options.post_script:
+    variables = {"root": root, "options": options}
+    execfile(options.post_script, variables)
+    options = variables["options"]
+    root = variables["root"]
+    test_sys = root.system
+
 Simulation.run(options, root, test_sys, FutureClass)
diff -r a0ca00815cc4 -r 928a955e742b configs/example/se.py
--- a/configs/example/se.py	Fri Sep 28 09:35:25 2012 -0400
+++ b/configs/example/se.py	Wed Oct 03 17:30:13 2012 +0200
@@ -209,4 +209,13 @@
     CacheConfig.config_cache(options, system)
 
 root = Root(full_system = False, system = system)
+
+# Let the user finish-up setting parameters
+if options.post_script:
+    variables = {"root": root, "options": options}
+    execfile(options.post_script, variables)
+    options = variables["options"]
+    root = variables["root"]
+    system = root.system
+
 Simulation.run(options, root, system, FutureClass)