Make cream cheese skulls one day in advance. Line pan cavities with plastic wrap. Prepare cream cheese spread following recipe directions. Tint flesh color. Spray cavities with non-stick spray. Use spoon to mold spread in cavity and spatula to push spread into grooves. Chill overnight. Use cream cheese to attach skull halves together.
Decorate cream cheese skulls. Use knife to cut olives in half. Place in eye cavities. Use back of spoon to mash up pimentos slightly. Place on spread for blood and open wounds.