Controlling _mc from external loaded menu_mc

Hi all! I’m new to actionscripting, so my problem may have a quite common solution to a skilled scripter. I apologize for this.

I have my main_mc that has several external _mc loaded ad parts of the whole site.

one of them is the menu_mc (accordion panel).

each part of the menu_mc is an external loaded submenu_mc contening buttons_mc

each button should load a specific 1_mc, 2_mc etc… to a target position (named “target_1”) on main_mc.

I have no success to do so.
I tried several ways but seems impossible to a niubbo like me.
could some (saint!) one write down here necessary script to achieve this?

thanks in advance, Teo