I thought this 'should' have the same effect as that of the first bit of code... but apparently not?
What I want to do is load a movie over a dummy movie (existing in a movie on the main timeline). Now, it just so happens that my dummy movie only exists on a specific frame - hence, I have to instruct it to go to the frame before I load it.
... although you are telling the movie clip to go to a specific frame, because you are then instantly loading a movie, Flash has not yet had time to go to the next frame.