First, I know absolutely zilch about the 'execution' laws of New Hampshire!
But, I would imagine that your state permits the recording of that judgment in the real property records of the County in which this POS resides. This is sometimes called a 'judgment lien', or an 'abtract of judgment lien', or a 'judicial mortgage', depending upon your state's particular language.
If he has a house or other real property, and he decides to sell it some day, the title company may require that he pay off your judgment before they will guarantee title to the property to his buyers!
At least that's the way it would work in Texas!
I know that most New England states permit almost nothing in the way of 'exempt' property, so it may be that you can attempt to seize and sell some of his personal property!
I would imagine, however, that the four judgment creditors ahead of you have all likely tried the same things to collect on their judgments!
With your recorded judgment, and the others, this POS's future would-be customers may at least discover his past misconduct and not contract with him for that reason ..... if they look at the judgment records.
Your situation is much more common than you can probably imagine!
Eric The(BeenThere,DoneThat)Hun