Dissolve jello in boiling water. Drain pineapple, reserve juice. Add water to juice to make 1 cup, add to gelatin. Chill until slightly thickened. Measure 1 1/2 cups, pour into 6 cup fluted round mold. (looks like a wreath when unmolded), Chill until set but not firm. Combine sour cream and mayonnaise, blend in remaining jello. Chill until thickened. Add pear, pineapple, nuts and cherries. Spoon into mold. Chill at least 4 hours. Unmold. This can be made with sugar free jello. I use mint leaves and 3 half slices of maraschino cherries to make a holly on the wreath after it is unmolded. Very pretty!!