Moss is very versitile, Janie... I saw on one of my gardening shows a garden in North Carolina... The owner had moss growing exclusively where there wasn't alot of sun... From what you've said, that is waht you have... Also, moss does very well in acid soil... The gardener in that segament siad she just went out into the woods and scooped up the moss, brought it home and replanted it... We have a moss garden here and it does very well... Shade or semi-shade seems to be the most important aspect of growing good moss...
Keep us posted...
BTW, if yer having trouble finding moss then get in yer car and come on up for a couple days... There's plenty of it back in the woods...