I was working on trying to set a mask to a loaded image, reguardless of what size the image was. I thought about using the tweenClass and the onLoad listener together and this is what I came up with. Not as cool as some of the other mask transitions, but it may help someone out. 
Get 2 jpgs and name them test and test2 and put them in the same directory as the swf.
Peace,
Josh
