I don't know about your Hershey's Kisses Peanut Butter cookies, but I can tell you that I have made the Quaker Oats "Oatmeal Cookie" recipe for more years than I like to remember. The original recipe called for shortening. Now the recipe uses butter. They are baked at 350 degrees F. Butter could burn if your oven is too hot. I'd try a small batch of your recipe. Can it be cut in half? I looked at the recipe and cutting in half isn't a good option, because it uses 1 egg. If you could find some really small eggs, cutting in half might work. I would bake at 350 degrees for a few minutes longer and use butter. These days, I am like you, I don't use shortening for very much of my cooking.
Have fun and let us know how they came out.