Need a big map small map example code

I need to figure how you do the following:

Have a big map.
On top of the big map you have a small map.
On top of the small map you have a small box you can drag around.
Dragging the box around moves the big map.

Now… the thing is… I have a Flash 5 example that does what I need.
BUT… it’s much more complicated than need be.
And for some reason the FLA is very big.

See the attached SWF for an example of what I need.

Thanks.

OM