So, uh...  What does one do with one's original files?  Is there a directory structure needed?  Just slap them wherever you unzip this?

Instructions on the download page say:

You will need Wing Commander 1 original files DOS or the Kilrathi Sega. Go to GOG to purchase the game if you don't own it.

Then after downloading Wing Com Reloaded and starting it, you can just point it at the UNZIPPED Kilrathi Sega folder during initial setup. It will also work with the Dos version but sound will be better with KS.

Apologies, completely missed the additional instructions there.  Brain is trained to seek out just the download link and ignore the rest, as usually download pages are  just ads and spam and such. with a download link crammed in.

My bad, and thanks for the info.