Peel and pit peaches; finely chop or grind. Measure 41⁄2 cups into 6 to 8 quart sauce pot; add ginger. Measure sugar and set aside. Mix fruit pectin into fruit in sauce pot. Place over high heat and stir until mixture comes to a full boil.
Immediately add all sugar and stir. Bring to a full rolling boil and boil 1 minute, stirring constantly. Remove from heat and skim off foam with metal spoon.
Ladle quickly into hot jars, filling within 1⁄8 inch of tops. Wipe jar rims and threads. Cover with two piece lids.
Screw bands tightly. Invert jars for 5 minutes, then turn upright. After 1 hour, check seals.