There is a built in copy paste that might work for you. if you customize the toolbar in the write window there is a quote button. it will paste into the current message the last message viewed. looking just as if you had pressed the reply button on it. Not as simple as you hoped I am sure, but better than copy and paste.

Hi, Sorry I didn't answer sooner, I was busy fighting Windows 10 demons.  :-) Actually, your suggestion for the Quote icon on the Toolbar worked perfectly. Just open the emails you want to chain together, open a Write document or do a Reply to an email. Place your cursor where you want the next email inserted and hit the Quote icon. And it works with multiple emails, just open the email you want pasted, then go back to the document your are writing, place the cursor, hit Quote, and it will place the email where the cursor was. Pretty cool. And so much easier than copy/paste. Thanks so much for the suggestion. This comes in really handy when I get behind on my emails and want to answer 4 or 5 emails with one reply. We can mark this issue as Happily Solved, that's a whole lot better than Solved.  :-)