
I have got to hand it to you, Doug - you obviously know your stuff (a big hand to him, everybody!) - you were absolutely right.
I have downloaded FSSound.dll as you suggested and - lo and behold - my Beaver now has a fully equipped panel with all gauges, switches, controls and all!
What threw me off your original track was that I didn't get a warning about FSSound.dll as in your example. Anyway, your FAQ page now has a permanent place in my bookmarks so I know where to look first next time. Well, I certainly learned something through this - thanks again to everyone and I guess we can close the topic here.
Happy simming/flying to all - and may your landings be smooth (not like some of mine still are - off 'piste' I guess a skier would call it

(!) but then I don't have my virtual PPL yet - still a relative newcomer to this exciting world of virtual flying).