Steps for White Balance and Exposure
Upload all of your files into Photoshop. choose one to be your "Base" and copy and paste all off the other images into the base. It should look like Step 2 below.
Step 2: Label your layers with either the exposure comp. or the white balance name by double clicking on the name.
Step 3: Change the image size to 2x the width of number of images you have. For example if you have 7 images then you will change the width to 14 (7 x 2 = 14). Make sure the link is checked so that your image isn't distorted.
Step 4: Click on the top layer. Measure 2 inches over with the rectangle select tool. If photoshop doesn't have the rulers bar on top you can turn it on by going to View-Rulers. Select everything but the first 2 inches and hit delete.
Step 5: Click on your second layer. Measure 4 inches over with the rectangle select tool. Select everything but the first 4 inches and hit delete. Keep doing this on each layer leaving a 2 inch section on each layer.
Step 6: Go through all your layers so that only 2 inches of each layer shows.
Step 7: When done click on the text tool and label each of the 2 in sections with the appropriate label.