Placing random MC on stage, with random MC inside

Hi guys

I have 4 movie clips in the library, each with 5 frames in them.

What I need, is at a random interval, one of these movie clips to be placed on the stage in a set place (each of the 4 will only appear on one particular place on the stage) and play through the frames.

Also, I need the item that is on each frame of each movie to randomly load from an array of 7 items, each with their own stored characteristics.

Anyone able to give me some pointers? im using mx2004