Controlling loaded movies at particular times

controlling loaded movies at particular times
i would like an already loaded movie on level 0 to play at a certain frame when another external movie ( level 4) is at a particular frame, all controlled by a button that would control both.

step 1:
movie 1 is loaded and up in level 0

step 2:
when the button is pressed:
it loads movie 2 in level 4 and when movie 2 gets to frame 25

step 3:
movie1 plays from frame 5 and jumps to frame 15.

i cannot even fathom how to script this to a button.

please help.
thanks!