P.S.
I am a godparent and I never attended a class. There was a ceremony at the Baptism and the priest just walked us through what to do. He may have advised us before hand what was going to happen.
There is a baptism, where the baby is held and sprinkled w/holy water. Then I had to repeat a holy prayer while holding the baby and the priest laid his hand on his head. I just said whatever the priest said. Then we paraded down the front and when it was the baby's turn, each godparent had to stand before the baby, parents and priest and take vows, promising to keep watch over the baby's physical and spiritual well being. Then I think we all prayed w/the priest, took pictures and we were done! It was a long ceremony but harmless.