Opening .swf files within another .swf file

Hi everyone, i’m having some problems with something i’m trying to do in Flash.

Basically, I have one .swf file, which is a menu, however, if the user needs to go back, I need to let them do this, so I was wondering how I would be able to open another .swf file in the same window, and close the old window, so it looks like one complete system.

e.g.

| menu1.swf | --> | menu2.swf |—back button pressed -->| menu1.swf |

I hope i’ve been clear enough, thanks in advance!