Dynamic interaction with symbol

iv got a symbol that follow the mouse on rollover. if you release the button it will return to its place of origin. if you kno how to give it a number of home points, and on release it will play a specific movieclip??
heres a basic file to give you a better idea. thanx

on release over (a) will play movie called a,
also leaving the object there. if you decide to take object out it will return to frame 1 of movie a.
also for area (t)