Here's a link to some galleries with some pretty unique pics that I found about a year and a half ago.
http://mainetwofooters.fotopic.net/You can also always go to NERail.com and sift through the Edaville pics, there are some old school ones in there.
Edaville's engines actually looked much like they did in Maine for the first 5-6 years in Massachusetts. Ellis Atwood wanted a real working railroad, and so the engines and cars more or less retained their Maine look to them.
When Atwood's widow and his sons ran the railroad, then the strange colors started coming out. (Funny story: On Monson #4, if you look at places on the cab and running boards where the paint is peeling or has been stripped off, you can actually see remnants of the different colors that it used to be painted. I personally have found fire engine red, royal blue, and some sort of puke green in different areas around the cab.)
When Nelson Blount took over in the 50s, the cars and engines continued to be painted in strange color combinations (making colors movies and photos from that era both a blessing and a curse). Blount also dressed the engines up with brass boiler bands (which they all still have to this day), old style headlights and fake diamond stacks (which were replaced with authentic parts upon their move to MNG). All of the locomotives had names on the cab, not just #7. I don't know what was on #3 and #4, but Blount's name was on the cab of #8 (which he considered the king of the Edaville fleet).
I think that during George Bartholomew's time running Edaville saw the equipment paint scheme's become the generic "Edaville" yellow with green trim that we all know from the late 70s and early 80s.