The speedController component is used to change the FPS (frames per second) of any MovieClip or externally loaded movie at runtime. The FPS is independant of the FPS at which the main movie is set to run. This component has slider which displays the speed from -100 to 100 to increase, decrease or reverse the speed of the movie or MovieClip with which the speedController is associated.
This userguide explains how to use the speedController in various different loading scenarios.