1. Completely forget that you ever learned from any source that it
might be a good idea to have a project folder with the apps inside it;
the tutorial does that because it's simpler and easier for purposes of
introducing Django, but in real-world situations it's generally a
terrible idea. Refactor the applications so that they can happily
exist on their own as top-level modules directly on your Python path,
and change your import statements to reflect this.

2. Read the documentation on the sites framework and add relations
from your models to the Site model, and have your views retrieve only
those objects related to the Site object currently being served:
http://www.djangoproject.com/documentation/sites/

3. Set up a second settings file, and optionally a second URLConf if
you want a different URL structure, and optionally set up the
ADMIN_FOR setting so you can share a single instance of the Django
admin between sites.

4. Enjoy.

--
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."