Photo Effect - Action Shot with Multiple Images Merged

A month a ago (I know waaay back then...) I posted this. A couple people asked me how I did it and I said I would try to do a tutorial so I'm going to do my best. this is for Sassy Pants because I TRY to keep my word! [I'm not good at teaching - especially when most of the time I stumble through "happy accidents" in PS Elements.]

First of all, I use Photoshop Elements 3, so I work with layers. Since I'm self taught, I tend to wade through each photo effect like a bull in a china cabinet. [Not that bulls actually wade in China cabinets - nor do they even fit... Another cliche that I find, well, curiouser and curiouser. The origin of said cliche being Bull in a China Shop - makes more sense. Yes? But I digress.]

Where was I? Tutorial, yes.

Here are the 3 pictures that I started with, I took 2 at one point in the day and took another one when we came back to the attraction.
I used the vertical as the original, I sharpened (defogged) it using the Unsharp Mask filter. Then I repeated the process with the other two pictures.

[Since I only have PSE3, I can't run very many actions, or record my own so - A.) I have to repeat the steps on each picture manually and B.) that's why I can't always remember the steps to my photo editing projects.]

Next I cropped the 2 horizontal pictures leaving only what I needed. Now they are ready to add the the original document.

Then I drug the first picture over to the original document to create a new layer.

I changed the transparency to 50% to see my picture underneath. I resized the new layer to match it as best I could to the original picture (background layer) . (You can play with the opacity to achieve the result you want once you have the picture placed where you want it.)

Next I used the Eraser tool set in brush mode at 50% to erase all the edges around the layer until only Harrison was left. (example 1 & 2)

example 1 - New layer at full opacity, partially erased

example 2 - New layer at 50% opacity with background layer

Then I added the second picture as a new layer and repeated the steps. (example 3)

example 3 - Second layer added but not sized yet.

After added the two layers the original was left with some fog from erasing around the 2 new layers. (example 2) I wanted the "3rd Harrison" to be full opacity and crisp.

I clicked on the background layer and created a duplicate layer. I moved the copied layer to the top of the layer stack and then erased only the areas where the I wanted the other layers to show through

example 4 - all layers except the original background, I've erased the areas to allow the other layers to show though leaving a halo effect.

Finally, I flattened the image, ran the Unsharp Mask one more time and saved it as a new file.The final result

I hope I my steps sense, if not feel free to ask me, and if you have an easier way to create this effect link it to the comments!