I thought it was going to be so very difficult, but in reality - it's pretty easy. Thanks to the people over at BloggerSentral.com, they created a tutorial to help you add the code to your blog!
I thought I would add in some helpful pictures of the process too.
First, start here on the Template Tab for the "Edit HTML" button:
Now, make sure you scroll ALL the way the bottom of your code.
See... line 2028! Not kidding around. Remember after the close BODY tag, but before the end HTML tag.
Enter the code from BloggerSentral.com...
and.... MAGIC! You have the instant pin button on all images. They have extra steps for being able to not have it on some pictures, but on others too.
Edited... the last BloggerSentral link is now working! Thanks to everyone who told me!