It's clear ROY and Turnoi didn't read my previous post in this thread before posting in it themselves.
So I welcome both of them, and any other interested parties, to visit the link below, which has made their subsequent posts redundant from the viewpoint of offering advice to me. You'll see that I didn't require it at the time they posted their responses. To them I say, thanks all the same.

http://www.eslteachersboard.com/cgi-bin/forum/index.pl?read=51922