I already sent Michael a direct message but for anybody else that finds this thread I want you to know that this is exactly what my company does. We make a product called AdShotRunner™ that makes creating these kinds of screenshots or 'tearsheets' quick and easy. With just a few clicks you can get the screenshots you want created and automatically compiled into a PowerPoint file. Check out adshotrunner.com for more information or to sign up and try it out.
Just message me, this is easy.