So far I have found this site to be rather accomodating and very informative.
If my n00b Qs haven't been answered directly and satisfactorily, I have been able, through the various threads in the forum, to find exactly the solution I was looking for.
I would like to thank Retro-Nerd, Graham Humphrey and eLowar for their friendliness. (I probably forgot some others, so I apologise).
The link I found most helpful was this one: http://guide.abime.net/home3.htm
I also appreciate this site http://www.whdownload.com/games.php?name=%&sort=0&dir=0
, and have downloaded some games from it, but have not registered (yet). I like it because it seems unbloated, unlike http://www.planetemu.net/