The following is a typical error report:
The specified file is not a registry script. You can only import binary registry files from within the Registry Editor.
But even importing from within the registry editor fails!
I searched the web for the solution to this problem and the common factor was the culprit "TextPad"
TextPad fails to apply (and on saving REMOVES existing) Unicode marker strings at the beginning of a UTF-16 file:
namely 0xFF,0xFE for Unicode
& 0xFE,0xFF for Unicode (BigEndian)
Even lowly notepad can get THIS right!
Therein lies all your Unicode problems!
You naively omit the required identifiers when saving a UTF-16 file!!!!!!!!!!!!!!!!!