I guess this is how it's done.

manage.py

@@ -2,7 +2,7 @@
 import os, sys
 
 if __name__ == "__main__":
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mdb.settings")
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")
 
     from django.core.management import execute_from_command_line