A quick tip for all photoshop and Elements users:
When using layers, and I hope you are, give them a name. To name the layer is quite simple just click on the layer to get the drop-down menu and at the top click on rename layer. If you get loads of layers in a complicated edit you will find it easier to navigate. Layers can also be grouped together and color coded to make it easier still. I have worked on multi-layered images that have had about 50 layers in 10 groups of 5. When they are grouped together you can turn the whole group off and on - a great time saver when doing multiple roll-overs.