django-admin.py install <your app>
the auto-generated perms + your custom perm get added to the proper
table in the database.
For instance, in your Poll class, add the following line:
permissions = (("dummy", "Dummy permission"),)
and then run
django-admin.py install polls
(you will first have to delete the polls table). After the install
runs, you should see the three automatic/intrinsic perms as well as
your custom dummy permission.