If you have already registered for Richmond SPIRAL and now you want to add a new product, you don't need to register again. Log in with your email and password, click on the orange 'Add product' button and enter the access code for the new product.
The cover of the new product will appear in your Study panel (e.g. Thumbs Up! 3 in the image above). If you have more than two products, you will need to click on the orange arrow button to the right to see more products.
If you haven't yet registered for Richmond SPIRAL and you have an access code for a product, please see How to register for Richmond SPIRAL.