Great Lightning, thanks I am brave enough to do the rc script mod.
Your hardware hack set me thinking and I came up with another workaround that doesn't involve even opening the case.
Armada and a lot of laptops don't have a separate pc speaker, it all feeds through the builtin stereo spkrs. Push any old stereo plug into the external speaker socket and you'll hear nothing but silence, because the internal speakers are disconnected, non destructively!
all done and dusted, thanks again.