Performance -> Extend Service -> Forms: How to use created form?

Performance -> Extend Service -> Forms: How to use created form?

So I have created a new Annual Evaluation form (cloned from the original one) and now I want to use it in an Appaisal cycle.

QUESTION: How can I associate the form with the new Appraisal Template?

Also, what is the difference between an Appraiser and a Rater?