Hi Donny,
basically quite simple.
I started with a new playlist. ( Could have used an existing one instead)
Then pressed the Add Record , LIST icon
Then opened up my folder with the registrations ( registrations named after the songs)
Hi lighted the one/ones I wanted to add, pressed add to playlist, it goes back to playlist scree, then saved it.
If I wanted to add more at a later stage , just went thru same process ,
except for the first step of course, which was starting a new playlist.

Simple yes , in hindsight, but it was a bit confusing at first, I did have to read the manual mainly because , I ‘ve never done registrations before, and playlist function is new, as you are aware.