Just some follow up now that I've achieved what I wanted.
The relative I was sending the sub-tree to uses FH6, hence wanting to send him a project (not just a ged file), complete with all the media files just for that project (and
not any customisations).
Having gotten to the point as described in my initial post I then (after some experimenting):
used FH...Tools...Work with Data...Places, then sorted the places on the Used column to bring all of the ones with 0 together at the bottom of the list, select the bottom entry, then scroll up to the first used real entry and shift-click to
select all the "0 Used" plus one real entry, then merge all of those,
selecting the real one as the Merge into place. (I could have used the named list approach from the Places tab, but I think my way has fewer mouse clicks, and it's all done from the one window).
used the
"Check for unlinked media" plugin to display the list on unlinked media (to check it) then run again to delete all of the unlinked media.
closed FH, used Windows Explorer to delete empty or unwanted folders (I keep some research folders at the top level of each project), and delete the
ThumbCache.dat file.
open FH to double check everything's ok (and let it rebuild the much smaller ThumbCache.dat file).
run a full
FH Project Backup to create a ZIP file for emailing to my relative.
Job done, now it just remains for me to remember all this for when I need to do it again in a few months (or years) time - that's the hard part
(NOTE re Places - I don't use Address, all of my address information is in Places - 7 parts)
David Miller - researching Miller, Hare, Walker, Bright (mostly Herts, Beds, Dorset and London)