+worked for me on Windows-XP Professional and the emasc23 from ourcomments.org
+(@uref{http://ourcomments.org/cgi-bin/emacsw32-dl-latest.pl}). I'm no Windows user
+though and enhancements are more than welcome on the org-mode mailinglist. The
+original file is from
@uref{http://kb.mozillazine.org/Register_protocol}.

Could someone double-check this?

+@example
+REGEDIT4
+
+[HKEY_CLASSES_ROOT\org-protocol]
+@@="URL:Org Protocol"
+"URL Protocol"=""
+[HKEY_CLASSES_ROOT\org-protocol\shell]
+[HKEY_CLASSES_ROOT\org-protocol\shell\open]
+[HKEY_CLASSES_ROOT\org-protocol\shell\open\command]
+@@="\"C:\\Programme\\Emacs\\emacs\\bin\\emacsclientw.exe\" \"%1\""
+@end example
+
+@item
+macOS setup

See above.