Ted, upon opening any of the four files you mention you will see in the rectangle window on the right at the bottom, the name of the function that will be restored to factory out of the box condition. With that in mind you do not have to memorize any of this, you are showen what you are doing in black and white. A way you can give your keyboard what is called a hard reset to factory spects is to shut off the board. Hold down the four top left buttons in the rhythm group (8&16 Beat, Rock&Pop, Ballad, Jazz&Swing) and while holding these down turn on the keyboard holding these down until you see: Factory Initial Completed. However a hard factory initial will not mess up anything you have in your custom memory. Another thing I do is load the Initial Disk into the SD card in the last foulder which I name Initial Disk. This way, tucked out of the way in foulder 99 I never have to ask Ruthie what she did with that very important disk of mine. Also keeps her from thinking her memory is going.

Grasndpa Doug