In a bowl, beat cream cheese and gelatin until smooth. Drain pears, reserving syrup; set pears aside. If necessary, add enough water to syrup to equals 1 cup.
In a small saucepan, bring syrup to a boil. Gradually add to gelatin mixture, beating until smooth. Stir in ice cream until dissolved. Mash pears and fold into gelatin mixture. Pour into an greased 6-cup mold. Chill until firm.