leejosepho:
Many, many thanks for taking the time to answer my question and to do so in such detail. And my apologies for taking so long to come back to you, I was knocked offline for a few days ??
I’ve followed your advice and the “rewrite” code above did the job perfectly; all the old “ugly” URLS are now pretty. It did the job for ALL the URLS too, and I was able to safely delete the 500+ “old” lines of code.
I am marking this thread as (very well!) resolved and thank you again.
(I am though about to create a related thread, and hope you might see it; basically, I am curious, now that all the URLS are “pretty” if I should go into Google Webmaster Tools and request removal from the Google index of all those ugly URLS. Hope I might be lucky enough to catch you there later!)
Many thanks again.
D