This one is really good and simple!
from Nellie&Joe's Key West Lime Juice...

http://keylimejuice.com/recipes/key-lime-no-cook-cool-whip.htm

we can get Nellie & Joe's Key West Lime Juice (bottled) at almost any supermarket in NY & NJ...
really nice stuff... <img src="http://www.traveltalkonline.com/forums/images/graemlins/Thumbsup.gif" alt="" /> <img src="http://www.traveltalkonline.com/forums/images/graemlins/Thumbsup.gif" alt="" /> <img src="http://www.traveltalkonline.com/forums/images/graemlins/Thumbsup.gif" alt="" /> <img src="http://www.traveltalkonline.com/forums/images/graemlins/Thumbsup.gif" alt="" /> <img src="http://www.traveltalkonline.com/forums/images/graemlins/Thumbsup.gif" alt="" />

If you are willing to do more work... this recipe is excellent!
http://allrecipes.com/recipe/key-lime-pi...;e7=Home%20Page