I adore frozen peach bellini's and this recipe is very close to my favorite restaurant's drink. Another cooking website is where I found and adapted this recipe from.
Add a few frozen peach slices and liquor to blender and puree. The mixture should be taking on a slushy type texture.
Taste and add more liquor or peaches as needed. Add ice and continue to blend until a nice frozen texture is acquired. Pour into glasses and garnish with peaches.