Hi Arnie,
if you want to "copy" only the current Voice settings of the Parts Right 1 - 3 to another Registration (but the other settings of the target Registration should be retained), I recommend to use the Freeze function (as suggested by Fred). But I recommend to tick both "Voice" and "Keyboard Harmony/Arpeggio" in the Freeze settings. (This is always necessary, even if the Harmony / Arpeggio function is currently not activated.)
If you want to "copy" also the LEFT Voice to the other Registration, you have to freeze also the STYLE.
BUT: The easiest way is what Eileen had already suggested (without using Freeze). The only thing is, you may have to redo some other settings (e.g. selecting the Style) in the overwritten target Registration.
Best regards,
Chris