Steve Grindlay's excellent presentation is now available to all.
You can find it here (http://fhhistory.blogspot.com/) - a rather complicated way to show it, but it allows you to see each slide and zoom in to see the details of the photos.
I thoroughly recommend a quick browse through the topics and you can then take more of a look at the ones of interest. I know, for example, that many will be interested in the list of current and past public houses, or the surviving evidence of the local breweries.
I don't think Steve has a site of his own for your questions, but you can always log in to either the Forest Hill forum at www.se23.com or the Sydenham Forum at forum.sydenham.org.uk/ as I know he uses these regularly.