Edit the end-app's Gemfile and ass these entries:
gem 'lightspeed_engine', :github => 'ginlane/lightspeed_engine'
gem 'spree_lightspeed', :github => 'ginlane/spree_lightspeed'Bundle with bundle in the project dir.
Install migrations with rake spree_lightspeed:install:migrations.
Then proceed to mount the engines in config/routes.rb:
mount LightspeedEngine::Engine, :at => '/admin/'Extension migrations do not need to be manually added. They will be injected into the host app's migration path at loadtime.