I learned soooooo much from working with the elements of this Corkboard action set!
Anyone who has Photoshop and wants to get better at using and understanding (and being frustrated by) layers, should play with this set, downloadable here: http://share.studio.adobe.com/axAssetDetailSubmit.asp?aID=11137&back=http%3A%2F%2Fshare%2Estudio%2Eadobe%2Ecom%2FDefault%2Easp