diff -Nuar ubiquity.orig/scripts/install.py  ubiquity/scripts/install.py
--- ubiquity.orig/scripts/install.py	2010-03-24 13:47:05.000000000 +0100
+++ ubiquity/scripts/install.py 	2010-03-24 13:56:09.000000000 +0100
@@ -440,6 +440,8 @@
             self.db.progress('INFO', 'ubiquity/install/log_files')
             self.copy_logs()
 
+            self.run_target_post_hooks()
+
             self.db.progress('SET', end)
         finally:
             self.cleanup()
@@ -976,6 +978,29 @@
                 raise InstallStepError(
                     "Failed to detach loopback device %s" % dev)
 
+    def run_target_post_hooks(self):
+        """Run hook scripts from /usr/lib/ubiquity/target-postconfig. This allows
+        casper to hook into us and repeat bits of its configuration in the
+        target system."""
+
+        hookdir = '/usr/lib/ubiquity/target-postconfig'
+
+        if os.path.isdir(hookdir):
+            # Exclude hooks containing '.', so that *.dpkg-* et al are avoided.
+            hooks = filter(lambda entry: '.' not in entry, os.listdir(hookdir))
+            self.db.progress('START', 0, len(hooks), 'ubiquity/install/title')
+            self.db.progress('INFO', 'ubiquity/install/target_hooks')
+            for hookentry in hooks:
+                hook = os.path.join(hookdir, hookentry)
+                if not os.access(hook, os.X_OK):
+                    self.db.progress('STEP', 1)
+                    continue
+                # Errors are ignored at present, although this may change.
+                subprocess.call(['log-output', '-t', 'ubiquity',
+                                 '--pass-stdout', hook])
+                self.db.progress('STEP', 1)
+            self.db.progress('STOP')
+
     def run_target_config_hooks(self):
         """Run hook scripts from /usr/lib/ubiquity/target-config. This allows
         casper to hook into us and repeat bits of its configuration in the