Added some sample config to see it work

sample/manage.py

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+#!/usr/bin/env python
+from django.core.management import execute_manager
+try:
+    import settings # Assumed to be in the same directory.
+except ImportError:
+    import sys
+    sys.stderr.write("Error: Can't find the file 'settings.py' in the directory containing %r. It appears you've customized things.\nYou'll have to run django-admin.py, passing it your settings module.\n(If the file settings.py does indeed exist, it's causing an ImportError somehow.)\n" % __file__)
+    sys.exit(1)
+
+if __name__ == "__main__":
+    execute_manager(settings)

sample/settings.py

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+# Django settings for sample project.
+import os, sys
+
+APP = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+sys.path.append(APP)
+DEBUG = True
+TEMPLATE_DEBUG = DEBUG
+
+ADMINS = (
+    # ('Your Name', 'your_email@domain.com'),
+)
+
+MANAGERS = ADMINS
+
+DATABASE_ENGINE = 'sqlite3'           # 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
+DATABASE_NAME = 'dev.db'             # Or path to database file if using sqlite3.
+DATABASE_USER = ''             # Not used with sqlite3.
+DATABASE_PASSWORD = ''         # Not used with sqlite3.
+DATABASE_HOST = ''             # Set to empty string for localhost. Not used with sqlite3.
+DATABASE_PORT = ''             # Set to empty string for default. Not used with sqlite3.
+
+# Local time zone for this installation. Choices can be found here:
+# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
+# although not all choices may be available on all operating systems.
+# If running in a Windows environment this must be set to the same as your
+# system time zone.
+TIME_ZONE = 'America/Chicago'
+
+# Language code for this installation. All choices can be found here:
+# http://www.i18nguy.com/unicode/language-identifiers.html
+LANGUAGE_CODE = 'en-us'
+
+SITE_ID = 1
+
+# If you set this to False, Django will make some optimizations so as not
+# to load the internationalization machinery.
+USE_I18N = True
+
+# Absolute path to the directory that holds media.
+# Example: "/home/media/media.lawrence.com/"
+MEDIA_ROOT = APP + '/static/'
+
+# URL that handles the media served from MEDIA_ROOT. Make sure to use a
+# trailing slash if there is a path component (optional in other cases).
+# Examples: "http://media.lawrence.com", "http://example.com/media/"
+MEDIA_URL = '/static/'
+
+# URL prefix for admin media -- CSS, JavaScript and images. Make sure to use a
+# trailing slash.
+# Examples: "http://foo.com/media/", "/media/".
+ADMIN_MEDIA_PREFIX = '/media/'
+
+# Make this unique, and don't share it with anybody.
+SECRET_KEY = 'bwq#m)-zsey-fs)0#4*o=2z(v5g!ei=zytl9t-1hesh4b&-u^d'
+
+# List of callables that know how to import templates from various sources.
+TEMPLATE_LOADERS = (
+    'django.template.loaders.filesystem.load_template_source',
+    'django.template.loaders.app_directories.load_template_source',
+#     'django.template.loaders.eggs.load_template_source',
+)
+
+MIDDLEWARE_CLASSES = (
+    'django.middleware.common.CommonMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+)
+
+ROOT_URLCONF = 'sample.urls'
+
+TEMPLATE_DIRS = (
+    # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
+    # Always use forward slashes, even on Windows.
+    # Don't forget to use absolute paths, not relative paths.
+)
+
+INSTALLED_APPS = (
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.sites',
+    'categories',
+    'editor',
+    'mptt',
+)
+EDITOR_MEDIA_PATH = '/static/editor/'

sample/urls.py

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+from django.conf.urls.defaults import *
+
+# Uncomment the next two lines to enable the admin:
+from django.contrib import admin
+admin.autodiscover()
+
+
+import os
+
+ROOT_PATH = os.path.dirname(os.path.dirname(__file__))
+
+urlpatterns = patterns('',
+    # Example:
+    # (r'^sample/', include('sample.foo.urls')),
+
+    # Uncomment the admin/doc line below and add 'django.contrib.admindocs' 
+    # to INSTALLED_APPS to enable admin documentation:
+    # (r'^admin/doc/', include('django.contrib.admindocs.urls')),
+
+    # Uncomment the next line to enable the admin:
+    (r'^admin/', include(admin.site.urls)),
+
+    (r'^static/categories/(?P<path>.*)$', 'django.views.static.serve',
+        {'document_root': ROOT_PATH + '/categories/media/categories/'}),
+
+    (r'^static/editor/(?P<path>.*)$', 'django.views.static.serve',
+        {'document_root': ROOT_PATH + '/editor/media/editor/',
+         'show_indexes':True}),
+)