In order to create composite images you need a pixel editing program such as Photoshop, Photoshop Elements, or some other program of your choosing. It is impossible to do that in Lightroom.
Thanks for the response. As to the second part of my question,
I thought this would be easy to do within Lightroom without having to go to a third party source but, who knows?
I've been searching all over the web and found info on 'LR Enfuse' and 'OnOne Photo Perfect Layers’ from 2010 but I'm open to current plug in ideas if necessary. Please advise...
Sorry, but I don't know anything about either one of those plug-ins. As you are probably aware, Lightroom itself does not do layers. All editing is totally nondestructive, and therefore imposes a few limits on what can actually be done with Lightroom itself.