I am guessing that photo 5 was a second one at Heath, and that 6 is
somewhere in the Cleveland Circle complexity, but I can't deduce where. It
does show a Boeing-Vertol.
From the wikipedia reference:
MBTA's last revenue run of LRVs was made on 16.3.07. MBTA continues to
operate three LRV work cars:
Rerailer car 3417
Track geometry car 3448
Maintenance of Way car 3453

Mon.1.1.01. ...Park St - green line - Heath - Copley - Cleveland Circle -
walk - green line Reservoir - Riverside - Kenmore - Boston College - xxx -
walk one stop - yyy - Government Centre - Lechmere - North Station - Park St
- red line - Braintree - JFK/UMass - Mattapan - PCC tram - Ashmont -
Mattapan - red line - Down Crossing - orange line - Chinatown - walk -
Boston South - Twilight Shoreliner -
Maps:
www.mbta.com/schedules_and_maps/subway
http://world.nycsubway.org/perl/mapshow?bostontr.gif

Roderick B Smith
Rail News Victoria Editor