When working in Adobe Photoshop, the best way to handle layers is to group them. When you have numerous layers, things can tend to get disorderly. To avoid confusion, each layer should be named, as well as any sub-folders created. Grouping layers is one of the easiest ways to avoid headaches while working with multiple layers. There are two different ways to group layers in Photoshop. Use the method that you feel more comfortable with and feel works the best for you.

Difficulty: Moderately Easy Instructions
Grouping Layers
1
 Put each image on a separate named layer.

2
Click on the layer you want in the "Layers" palette on the right.

3
 Go to the "Layer" menu, and select "Group with Previous" (Control+G). Now the two layers (or more if you wish) are grouped together.

Layer Groups
1
Start with your image, and make sure each image is on a separate named layer.

2
 Click on "New Set" (the manila folder-looking icon) at the bottom of the Layers Palette. Rename it to whatever you wish.

3
 Take the first layer you want to put in the new layer folder, click on it and drag it to the new folder. Place it over the folder until the name for the folder is highlighted. Repeat for the rest of the layers you wish to group.

4
 Once all of the layers are in, you can click on the small triangle next to the folder to minimize/maximize the new "sub-folders." When they are minimized (or hidden from view), you now have more room in your Layers Palette without having to scroll as much.

5
 Even though the layers are grouped, you can still move each individual layer by clicking on it. When you want to hide the group, you can just hide the new folder, which will hide each sub-layer at once (instead of clicking each layer individually).