Drag & Drop 'Related' Question (Not Asking How To Drag & Drop)

Ok… so i wanna make something where i have several images (movieclips) that open out on a menu… and then they are all drag-able… and i have 5 slots on the screen that any of the movieclips can be draged into… now… i want to make it firstly so the movieclips center themselves into the circle… and also… if there is already a movieclip in there i want the movie already in there to return to the menu and the new one to take it’s place in the circle…

your help would be muchly appreiciated…

also no need to ask me to for .fla coz i haven’t made it yet… lol…

thanx