Ladies and gentlemen, boys and girls. thanks again for your varied instructions on how to merge the files so that they can play concurrently, and therefore not having to get off my lazy *rs*.
For me to be able to do this, and I didn't know if it could be done in the first place, the explanation has to be quick, simple, and explained in a manner that could be unerstood by a gerbil.
So, I've done it. Incredible, but success. Without furher ado, the winner of simplest and easiest instructions to follow is........Mark Davies......I just dragged the files into Media Player, and hey ho here we go.....thank you Mr Davies.