Install the plugin(s) for the relevant application(s) from Envoy's PLUGINS menu. That's it! You are ready now to submit. When submitting a scene, particularly for the first time, always run a couple of representative frames to test the results. Should there are any issues with the submission, it is better to discover these early, before submitting the complete and/or high resolution version of the scene and using up your credits. This practice will help to keep your costs down as well as reduce your project duration.