Place halved, pitted, peeled peach in blender. Pour/scoop frozen limeade into blender. Pour 6 oz light rum over all. Add ice to near top of blender, leaving a bit of room.
This is where the magic happens. Blend till it's 'just right.' This will mean it's slushy, without any large chunks of ice, but not so blended that it begins to turn liquid-y. Good luck.