Try this one...

1 cup freshly squeezed orange juice
1 cup pineapple juice
1 cup guava nectar
1 measure Mt. Gay rum
Dash of freshly squeezed lime juice
Dash of Angostura bitters
Grenadine to desired taste and color
Orange slices ad pineapple wedges, for garnish

In a pitcher, combine the first seven ingredients. Pour over tall glasses of ice and serve. Garnish each with an orange slice and a wedge of pineapple.