How to make an movie with mask, drag and animation?

Hello people, i am new at flash but i have tryied a couple of thing but i cant do this and i would apreciate if you could help me please :

Example imagine a 800x600px movie and in the middle exists another movie loaded into target (ex. 200x100px).

In the second movie i want to show an animation of a real map from point A to B zoomed (this map is larger than the movie itself), or that the map can be draggable so that the person can check the streets.
My problem as you can imagine is that the map is larger and therefore it apears all in the first movie and not only the part that i want to show. do you understand?

i triyed to made an static mask but it shows the all map.

thx in advanced