Are you talking about a Tri Shutter card (pictured below)? If this is what you are looking for, you can find some great tutorials on Bonnie's blog.
I just created one for Angels Landing and used this tutorial:
http://craftiblog.wordpress.com/2009...card-template/
If you scroll down at the end of her post, she also has awesome sample cards/tutorials for the other versions.
Hope this helps...:mrgreen: