1In a medium mixing bowl, combine the graham cracker crumbs and melted butter. Mix well and press into the bottom of a 9 inch springform pan, and set aside to chill. In a saucepan, sprinkle the gelatin over the cold water and let sit for 1 minute. Then cook over low heat, stirring until gelatin is dissolved.
2In a medium bowl, beat cream cheese with the sugar until soft and smooth. Gradually stir in the evaporated milk, vanilla and lemon juice. Scrape bottom of bowl between additions, then stir in the gelatin mixture and the amaretto. In a separate bowl, whip heavy cream to soft peaks. Fold whipped cream into the cream cheese batter.
3Pour filling into the prepared crust and refrigerate for at least 8 hours before serving.