Larry Pages 55 - 58 in the manual will show you how to add an engine to the base with the remote. An engine module can do it but it is just as easy to add it yourself. Once you do a couple it becomes second nature. If you already have the Acela added to your remote you can get to the edit features screens by pressing ENG, then enter the Acela's ID Number, then press the INFO button. This will get you to the setup screens. They will be displayed across the remote.
Ron