In a large heavy saucepan, whisk eggs, 1 cup sugar and salt until blended; stir in milk. Cook over low heat until mixture is just thick enough to coat a spoon and a thermometer reads at least 160°, stirring constantly. Do not allow to boil. Remove from heat immediately., Quickly transfer to a bowl; place bowl in a pan of ice water. Stir gently and occasionally for 2 minutes. Stir in sweetened condensed milk. Press plastic wrap onto surface of custard. Refrigerate several hours or overnight., When ready to freeze, in a small bowl, mash peaches with remaining sugar; let stand 30 minutes. Fill cylinder of ice cream freezer two-thirds full with custard, stirring in some of the peaches; freeze according to manufacturers' directions. Refrigerate remaining mixture until ready to freeze., Transfer ice cream to freezer containers, allowing headspace for expansion. Freeze 2-4 hours or until firm. Repeat with remaining ice cream mixture and peaches.