I copied this from a drink I had at Red Lobster one time...
The only problem with this drink, is that it goes down FAR too easily and if you don't watch it...you will need to be carried in from the patio...not like I know that from experience or anything :P
1.5 oz coconut rum
splash of grenedine
orange juice & pineapple juice almost to top of glass (I mix these together before hand in a large pitcher)
slash of Southern Comfort to top of drink
Pretty coloured straw (it's a summer drink - you MUST have a straw!)