PREHEAT oven to 350°F. Grease two 8x4-inch loaf pans (1.5 L); set aside. Stir boiling water into dry jelly powder in medium bowl at least 2 min. until completely dissolved. Mix cake mix, oil, lemon peel, dissolved jelly and eggs in large bowl with electric mixer on low speed until moistened. Beat on medium speed until well blended. Pour into prepared pans.

BAKE 40 min. or until wooden toothpick inserted in centres comes out clean. Pierce cakes with large fork at 1/2-inch intervals.

MIX sugar and juice until well blended; carefully pour over cakes. Cool in pans 30 min. Invert cakes onto wire racks; gently remove pans. Cool cakes completely.