Glyn,

Denon offers complete code sets on paper, for most of
their products. In the Pronto forum, you can find a utility
which was contributed by Paul Friedlander. (I think this
is his name).

You run this utility and punch in a few of the code sniplets
from the Denon doc and it puts out a completed code string
for a Pronto. In most cases, you should be able to copy
and paste these hex strings into your Nevo SL configuration.

Dave