Now that "Scream" and "Scream 2" have given us horror film characters who know all the horror cliches, the time has come for a werewolf movie about characters who know they're in a werewolf movie. Not that such an insight would benefit the heroes of "An American Werewolf in Paris,'' who are singularly dim. Here are people we don't care about, doing things they don't understand, in a movie without any rules. Triple play. I was not one of the big fans of John Landis' original 1981 film, "An American Werewolf in London,'' but, glancing over my old review, I find such phrases as "spectacular set pieces,'' "genuinely funny moments'' and "sequences that are spellbinding.'' My review of the Paris werewolves will not require any of those phrases.