Where is the "INSTALLED_APPS"

[imv7]

INSTALLED_APPS = ( ... 'django.contrib.sites', # This is required by Django Classified

'bootstrapform',  # This is required by Django Classified
'sorl.thumbnail',  # This is required by Django Classified

'django_classified',

)

Where exactly needs to input those entries above?

[imv7]

in quickstart.py