You do not need a cover sheet for your OPAL submission. When you are ready to submit your OPAL, you will answer a series of questions that cover the information normally gathered in a cover sheet.
You are required to use the OPAL templates that are provided once you have registered at the site and made payment.
The templates for each strand must have all resources for each strand embedded into the strand. The reviewers who will be reviewing your submission must be able to connect the resources to the correct strands in order to complete your review. Uploading your resources separately from each strand may create challenges that prevent the reviewers from being able to review your submission. It will also make it extremely challenging for the administrator who has to review your submission.