Would it be possible if the person that provides the feed be able to add some High Enroute frequencies ? If this is ok and approved could they be 133.35,126.325,132.95,118.875,and 132.525. Lots of in and outgoing transatlantic flights on these.
It's unlikely you would hear very much on the frequencies listed above as they are mostly out of range of a radio located in Greenwood.
Moncton high sectors that you can hear (full sector coverage) from this location would include, to the south 135.20, 132.97, 128.37, and to the north 127.12, 132.70 (the sectors to the north are already covered on the Moncton radio).
You would get partial coverage of the adjacent Moncton sectors to the east, 132.80, 133.55, 135.77, 120.32, 125.25, 132.75, 133.30, 133.70, as well as Boston to the west on 133.45, 134.95(now using 118.55), 128.05.