Hi Peggy,
Perhaps I can be of some help. Having a similar goal as yours -- to help singers tap into their creative energies -- I wrote a book called Choral CHARISMA: Singing with Expression.
The book is designed to support more joyful and powerful singing, and is based on my several decades as an acting teacher (at the middle and high school levels), stage director, singer, and choral clinician.
If you're curious, you can find out more at my website (below).
Best of luck to you!
Tom
Tom Carter
http://www.choralcharisma.com
tpcarter@earthlink.net