hello!
I used the same thing! But I also need better solution.
My solution is:
lookto(get(hotspot[h54].ath),get(hotspot[h54].atv),,smooth(20,20,20),true,true,
tween(hotspot[h54].alpha,'1.0', 3); lookto(get(hotspot[h52].ath),get(hotspot[h52].atv),,smooth(20,20,20));tween(hotspot[h52].alpha,'1.0', 3));
lookto has donecall, but looktohotsot does not.
it is working for me.
Hope it helps!