Additional Teacher Recommendation Forms?

<p>Hi, I was wondering what to do with additional recommendations?
The ones provided in the Common App seem to only be meant for the 2 teachers in academic areas. If i were to have a recommendation from another person (not even school-related), would I still use those forms? </p>

<p>Also, would I use those forms for the recommendations for the arts supplement, or should the arts supplement recommender simply use a letter form?</p>

<p>Sorry for all the questions!
And thanks!</p>