links to a report
by Dave Kopel at TNR. Kopel says that the courts have no authority under NJ statutes to replace a candidate, and he cites the relevant statutes. He also points out that the candidate switch tactic has been tried in the past. Where there was no impediment to the old candidate serving in the position he had been seeking, permission was denied to replace the old candidate with the new one on the ballot. Kopel suggests the Carnahan Gambit.
And OpinionJournal.Com weighs in
with the same analysis (second item down). They refer to it as the "Jean Carnahan model." I prefer the Ludlum-like Carnahan Gambit, myself.