Preheat oven to 325 degrees.
Place the ham in a baking dish or roaster. Score the top of the ham in the diamond pattern, making slices about 1" apart.
Pour some vinegar over top of ham and place it in the oven. Bake for 1 hour and pour more vinegar over ham. Continue baking and pouring vinegar until it has baked for 4 hours.
Pack brown sugar into the opened score marks on top of ham.
Drain the pineapple juice into a small saucepan. Heat until it begins to simmer then add 1/2 --3/4 c. brown sugar. Remove from heat and stir until well blended.
Place 1 clove in scores at each corner. Place pineapple slices on top to cover and place one cherry in the center of each slice. You may need toothpicks to keep the fruit in place.
Baste the top of ham with the Juice mixture and put ham back into the oven. Turn oven to 350 degrees.
Baste the top of the ham with the Juice next 1--1 /2 hours (Remove liquids from bottom of baking dish as needed -- discard it.)
Let ham set 30 minutes before carving. If whole ham is used, begin carving at small end. Remove pineapples and cherries to serving platter as decorations. Enjoy!